diff --git a/changelog.txt b/changelog.txt
index b2ec8e8..2c065f9 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,10 @@
 ---------------------------------------------------------------------------------------------------
+Version: 1.0.6
+Date: 3.4.2022
+  Features:
+    - integrated realistic reactors into overhaul mode. [WIP]
+    - updated thumbnail
+---------------------------------------------------------------------------------------------------
 Version: 1.0.5
 Date: 2.4.2022
   Features:
diff --git a/data-final-fixes.lua b/data-final-fixes.lua
index 3ddcf3d..9378630 100644
--- a/data-final-fixes.lua
+++ b/data-final-fixes.lua
@@ -19,4 +19,14 @@ end
 --overhaul K2
 if (settings.startup['overhaul_mode'].value == true and mods["Krastorio2"]) then
     require('scripts/krastorio2/overhaul')
+end
+--overhaul with realistic reactors
+if mods["RealisticReactors"] then
+    for i,v in ipairs(data.raw.technology["nuclear-power"].prerequisites) do
+        if v == "effectivity-module-2" then data.raw.technology["nuclear-power"].prerequisites[i] = nil end
+    end
+
+    if (settings.startup['overhaul_mode'].value == true and settings.startup['overhaul_realistic_reactors'].value == true) then
+        require('scripts/realisticreactors/overhaul')
+    end
 end
\ No newline at end of file
diff --git a/info.json b/info.json
index 7a57e44..b0ac7ea 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
     "name": "248k",
-    "version": "1.0.5",
+    "version": "1.0.6",
     "title": "248k Mod",
     "author": "PreLeyZero",
     "factorio_version": "1.1",
@@ -12,6 +12,7 @@
         "?informatron",
         "?Krastorio2",
         "?IndustrialRevolution",
-        "?space-exploration"
+        "?space-exploration",
+        "?RealisticReactors"
     ]
 }
\ No newline at end of file
diff --git a/locale/en/lang_en.cfg b/locale/en/lang_en.cfg
index 56153df..14cf504 100644
--- a/locale/en/lang_en.cfg
+++ b/locale/en/lang_en.cfg
@@ -83,6 +83,9 @@ fi_materials_waste=Nuclear waste
 fi_materials_empty_solution=Empty solution container
 fi_materials_solution=Corrosive solution
 fi_materials_rich_powder=Rich powder
+fi_tech_fuel=Fission tech
+fi_test_fuel=Nuclear reasearch fuel
+fi_test_used_fuel=Used reasearch fuel
 
 
 
@@ -166,7 +169,8 @@ gr_materials_stacked_data_item=Stacked deep data
 gr_materials_charge_remote=Ultimate bug zapper remote
 
 
-
+#overhaul
+uranium-fuel-cell-updated=Uranium fuel cell (old)
 
 #fluid
 [fluid-name]
@@ -266,7 +270,8 @@ fu_ki_core_item=For usage please look into the ingame booktorio/Informatron wiki
 gr_white_hole_item=This machine can nearly replicate any item you put into!
 gr_materials_white_item=||Well done! You did it. You have reached the ultimate goal. With holding the 248k element you have beaten the 248k mod.||
 
-
+#overhaul
+uranium-fuel-cell-updated=This fuel cell can't be used in realistic reactor.
 
 #buildable entities
 [entity-name]
@@ -523,6 +528,7 @@ el_train_fuel=Train fuel
 fi_basic_fuel=Basic nuclear fuel
 fi_advanced_fuel=Advanced nuclear fuel
 fi_pure_fuel=High energy nuclear fuel
+fi_test_fuel=Nuclear reasearch fuel
 
 #settings
 [mod-setting-name]
@@ -540,6 +546,7 @@ el_burner_kerosene_power_output=Kerosene generator power output
 fu_burner_power_output=Fusion Stage burner power output
 override_krastorio_endgame=Adjust Krastorio2 recipes for Anti-matter reactor, Intergalactic transreciever
 overhaul_mode=Overaul vanilla/Krastorio2 by inserting 248k in progression, aswell as in techs and recipes. NOTE: When 248k is added in already existing save this may cause problems. For best gameplay use this on new world. 
+overhaul_realistic_reactors=Integrate Realistic Reactors in 248k. Only possible in Overaul mode.
 
 el_ki_beacon_effectivity_2=KI2 beacon effectivity
 el_ki_beacon_supply_area_2=KI2 beacon area
diff --git a/migrations/248k-1.0.6.lua b/migrations/248k-1.0.6.lua
new file mode 100644
index 0000000..7d65c32
--- /dev/null
+++ b/migrations/248k-1.0.6.lua
@@ -0,0 +1,13 @@
+if settings.startup['overhaul_mode'].value == false then
+    game.print("You are currently playing 248k on standalone Mode.", {r=0.5, g=0, b=0.5})
+    game.print("If you wish to play 248k as an overhaul mod with tech and item integration, especially in Krastorio2 turn on the mod setting", {r=0.5, g=0, b=0.5})
+elseif settings.startup['overhaul_mode'].value == true then
+    game.print("You are currently playing 248k on overhaul Mode.", {r=0.5, g=0, b=0.5})
+    game.print("If you wish to play 248k as an standalone mod without tech and item integration turn off the mod setting", {r=0.5, g=0, b=0.5})
+end
+
+for _, force in pairs(game.forces) do
+    force.reset_recipes()
+    force.reset_technologies()
+    force.reset_technology_effects()
+end
\ No newline at end of file
diff --git a/prototypes/248k_subgroups.lua b/prototypes/248k_subgroups.lua
index aaaca3e..f40fed4 100644
--- a/prototypes/248k_subgroups.lua
+++ b/prototypes/248k_subgroups.lua
@@ -392,6 +392,10 @@ data:extend({
         name = 'el_train_fuel',
         type = 'fuel-category',
     },
+    {
+        name = 'fi_test_fuel',
+        type = 'fuel-category',
+    },
     {
         name = 'fi_basic_fuel',
         type = 'fuel-category',
diff --git a/ressources/fission/fi_fuel/fi_fuel_tech_item.png b/ressources/fission/fi_fuel/fi_fuel_tech_item.png
new file mode 100644
index 0000000..04f153a
Binary files /dev/null and b/ressources/fission/fi_fuel/fi_fuel_tech_item.png differ
diff --git a/ressources/fission/fi_fuel/fi_fuel_test_item.png b/ressources/fission/fi_fuel/fi_fuel_test_item.png
new file mode 100644
index 0000000..3e48734
Binary files /dev/null and b/ressources/fission/fi_fuel/fi_fuel_test_item.png differ
diff --git a/ressources/fission/fi_fuel/fi_fuel_test_used_item.png b/ressources/fission/fi_fuel/fi_fuel_test_used_item.png
new file mode 100644
index 0000000..b86dfe8
Binary files /dev/null and b/ressources/fission/fi_fuel/fi_fuel_test_used_item.png differ
diff --git a/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_animation_2.png b/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_animation_2.png
new file mode 100644
index 0000000..72db8f1
Binary files /dev/null and b/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_animation_2.png differ
diff --git a/scripts/realisticreactors/data.lua b/scripts/realisticreactors/data.lua
new file mode 100644
index 0000000..e69de29
diff --git a/scripts/realisticreactors/overhaul.lua b/scripts/realisticreactors/overhaul.lua
new file mode 100644
index 0000000..2a46a11
--- /dev/null
+++ b/scripts/realisticreactors/overhaul.lua
@@ -0,0 +1,417 @@
+local function add_to_recipe(recipe, item, item_amount)
+    if not data.raw.recipe[recipe] then
+        return
+    end
+
+    if data.raw.recipe[recipe].ingredients then
+        table.insert(data.raw.recipe[recipe].ingredients, {type="item", name=item, amount=item_amount})
+    end
+
+    if data.raw.recipe[recipe].normal and data.raw.recipe[recipe].expensive then
+        table.insert(data.raw.recipe[recipe].normal.ingredients, {type="item", name=item, amount=item_amount})
+        table.insert(data.raw.recipe[recipe].expensive.ingredients, {type="item", name=item, amount=item_amount})
+    end
+end
+
+local function add_to_recipes(table_in)
+    --table structure: {{recipe, item, item_amount}, ... , ...}
+    for i,v in pairs(table_in) do 
+        add_to_recipe(table_in[i].recipe, table_in[i].item, table_in[i].item_amount)
+    end
+end
+
+local function change_table_index(table_in, structure)
+    
+    local indexed_table = {}
+
+    for _,v in ipairs(table_in) do
+        local indexed_sub_table = {}
+        for i,x in ipairs(v) do
+            indexed_sub_table[structure[i]] = x
+        end
+        table.insert(indexed_table, indexed_sub_table)
+    end
+    return indexed_table
+end
+
+local function add_to_tech(tech, pre_tech)
+    if not data.raw.technology[tech] then
+        return
+    end
+
+    if not data.raw.technology[pre_tech] then
+        return
+    end
+
+    table.insert(data.raw.technology[tech].prerequisites, pre_tech)
+end
+
+local function add_to_techs(table_in)
+    --table structure: {{tech, pre_tech}, ... , ...}
+    for i,v in pairs(table_in) do 
+        add_to_tech(table_in[i].tech, table_in[i].pre_tech)
+    end
+end
+
+local function remove_tech_card(tech, card)
+    if not data.raw.technology[tech] then
+        return
+    end
+
+    --in data.raw
+    --[[
+    ingredients = {
+        {'automation-science-pack',1},
+        {'logistic-science-pack',1},
+    }
+    ]]
+
+    for i,v in ipairs(data.raw.technology[tech].unit.ingredients) do
+        for j,w in ipairs(v) do
+            if w == card then
+                data.raw.technology[tech].unit.ingredients[i] = nil
+            end
+        end
+    end
+end
+
+local function remove_tech_cards(table_in)
+    --table structure: {{tech, card}, ... , ...}
+    for i,v in pairs(table_in) do 
+        remove_tech_card(table_in[i].tech, table_in[i].card)
+    end
+end
+
+local function remove_pre_tech(tech, pre_tech)
+    if not data.raw.technology[tech] then
+        return
+    end
+
+    for i,v in ipairs(data.raw.technology[tech].prerequisites) do 
+        if v == pre_tech then
+            data.raw.technology[tech].prerequisites[i] = nil
+        end
+    end
+end
+
+local function remove_pre_techs(table_in)
+    --table structure: {{tech, pre_tech}, ... , ...}
+    for i,v in pairs(table_in) do 
+        remove_pre_tech(table_in[i].tech, table_in[i].pre_tech)
+    end
+end
+
+local function add_tech_cards(table_in)
+    --table structure: {{tech, card}, ... , ...}
+    for i,v in pairs(table_in) do 
+        add_tech_card(table_in[i].tech, table_in[i].card)
+    end
+end
+
+local function add_tech_card(tech, card)
+    if not data.raw.technology[tech] then 
+        return
+    end
+
+    if contains_tech_card(data.raw.technology[tech].unit.ingredients, card) then
+        return
+    end
+
+    table.insert(data.raw.technology[tech].unit.ingredients, {card, 1})
+end
+
+function contains_tech_card(table_in, card)
+    for i,v in ipairs(table_in) do
+        if v[1] == card then
+            return true
+        end
+    end
+    return false
+end
+
+
+--===================================================================================================================
+--                              248k item/tech integration with Krastorio2
+--===================================================================================================================
+
+--[BUILDINGS]
+
+building_table = {
+    --{"kr-electrolysis-plant",           "el_materials_ALK", 10},
+
+}
+
+--[ITEMS]
+
+item_table = {
+    {"fi_train_equipment_generator_recipe",   "fi_tech_fuel", 10},
+    {"fi_equipment_player_reactor_recipe",    "fi_tech_fuel", 10},
+    {"fu_tech_sign_recipe",                   "fi_tech_fuel", 1},
+    
+}
+
+--[TECH]
+
+tech_table = {
+    {"fi_energy_tech",            "fi_solid_reactor_tech"},
+    {"nuclear-power",             "fi_energy_tech"},
+    {"fi_solid_reactor_tech",     "fi_materials_tech"},
+    {"fi_train_tech",             "nuclear-power"},
+    {"fi_refining_tech",          "fi_energy_tech"},
+    {"nuclear-power",             "fi_refining_tech"},
+}
+
+--[ADD TECH CARDS]
+
+add_card_table = {
+    --{"el_purifier_tech",            "space-science-pack"},
+    
+}
+
+--[REMOVE TECH CARDS]
+
+remove_card_table = {
+    --{"el_purifier_tech",            "logistic-science-pack"},
+    
+}
+
+--[REMOVE PREREQUISITES]
+
+pre_tech_table = {
+    --{"nuclear-power",            "effectivity-module-2"},
+    {"nuclear-power",            "uranium-processing"},
+    {"fi_energy_tech",           "nuclear-power"},
+    {"fi_solid_reactor_tech",    "fi_refining_tech"},
+    {"fi_solid_reactor_tech",    "fi_energy_tech"},
+    
+    
+}
+
+--===================================================================================================================
+--                              changes in entities and other protypes 
+--===================================================================================================================
+
+data.raw.item["uranium-fuel-cell"].localised_name = {"item-name.uranium-fuel-cell-updated"}
+data.raw.item["uranium-fuel-cell"].localised_description = {"item-description.uranium-fuel-cell-updated"}
+
+data.raw.technology["nuclear-fuel-reprocessing"].hidden = true
+
+data.raw.reactor["fi_solid_reactor_entity"] = nil
+data.raw.reactor["realistic-reactor-breeder"].energy_source.fuel_categories = {"fi_advanced_fuel", "fi_basic_fuel"}
+data.raw.reactor["realistic-reactor-normal"].energy_source.fuel_categories = {"fi_advanced_fuel", "fi_basic_fuel"}
+data.raw.reactor["realistic-reactor"].energy_source.fuel_categories = {"fi_advanced_fuel", "fi_basic_fuel"}
+for i=1, 250 do
+    data.raw.reactor["realistic-reactor-"..i].energy_source.fuel_categories = {"fi_advanced_fuel", "fi_basic_fuel"}
+end
+
+
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_advanced_fuel_recipe',
+})
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_pure_fuel_recipe',
+})
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_advanced_thorium_fuel_recipe',
+})
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_advanced_fuel_recycle_recipe',
+})
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_advanced_thorium_fuel_recycle_recipe',
+})
+table.insert(data.raw.technology["nuclear-power"].effects, { 
+    type = 'unlock-recipe',
+    recipe = 'fi_pure_fuel_recycle_recipe',
+})
+
+data.raw.recipe["realistic-reactor"].ingredients = {
+    {"fi_solid_reactor_item", 1}, {"fi_tech_fuel", 20}, {"heat-pipe", 20}
+}
+
+data.raw.recipe["breeder-reactor"].ingredients = {
+    {"fi_solid_reactor_item", 1}, {"fi_tech_fuel", 40}, {"heat-pipe", 20}, {"productivity-module-3", 3}
+}
+
+data:extend({
+    {
+        name = 'fi_test_fuel',
+        type = 'item',
+        icon = '__248k__/ressources/fission/fi_fuel/fi_fuel_test_item.png',
+        icon_size = 64,
+        stack_size = 20,
+        subgroup = 'fi_item_subgroup_b',
+        fuel_category = 'fi_test_fuel',
+        fuel_value = '50MJ',
+        fuel_glow_color = {r=0.1,g=0.74,b=0.39,a=0.5},
+        order = 'x-a',
+        burnt_result = 'fi_test_used_fuel',
+    },
+    {
+        name = 'fi_test_used_fuel',
+        type = 'item',
+        icon = '__248k__/ressources/fission/fi_fuel/fi_fuel_test_used_item.png',
+        icon_size = 64,
+        stack_size = 100,
+        subgroup = 'fi_item_subgroup_b',
+        order = 'x-b',
+    },
+    {
+        name = 'fi_tech_fuel',
+        type = 'item',
+        icon = '__248k__/ressources/fission/fi_fuel/fi_fuel_tech_item.png',
+        icon_size = 64,
+        stack_size = 100,
+        subgroup = 'fi_item_subgroup_b',
+        order = 'x-c',
+    },
+    {
+        name = 'fi_test_fuel_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'crafting',
+        ingredients = {
+            {'uranium-238',2},
+            {'el_materials_ALK',5},
+        },
+        result = 'fi_test_fuel',
+        result_count = 1,
+        energy_required = 2,
+        order = 'b-b',
+    },
+    {
+        name = 'fi_tech_fuel_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'crafting',
+        ingredients = {
+            {'fi_test_used_fuel', 1},
+            {'chemical-science-pack', 2},
+            {'uranium-238', 2},
+        },
+        result = 'fi_tech_fuel',
+        result_count = 1,
+        energy_required = 1,
+        order = 'b-b',
+    },
+    {
+        name = 'fi_use_tech_fuel_recipe',
+        type = 'recipe',
+        enabled = 'false',
+        category = 'fi_test_fuel_crafting_category',
+        ingredients = {
+            {'fi_test_fuel', 1}
+        },
+        result = 'fi_test_used_fuel',
+        result_count = 1,
+        energy_required = 5,
+        order = 'b-b',
+        hidden = true,
+    },
+    {
+        name = 'fi_solid_reactor_tech',
+        type = 'technology',
+        icon = '__248k__/ressources/techs/fi_solid_reactor_tech.png',
+        icon_size = 128,
+        prerequisites = {'fi_energy_tech','fi_refining_tech'},
+        effects = {
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_solid_reactor_recipe',
+            },
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_tech_fuel_recipe',
+            },
+            { 
+                type = 'unlock-recipe',
+                recipe = 'fi_test_fuel_recipe',
+            }
+        },
+        unit = {
+            count = '500',
+            ingredients = {
+                {'chemical-science-pack',1},
+                {'automation-science-pack',1},
+                {'logistic-science-pack',1,},
+            },
+            time = 30,
+        },
+    },
+    {
+        name = 'fi_solid_reactor_entity',
+        type = 'assembling-machine',
+        icon = '__248k__/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_icon.png',
+        icon_size = 64,
+        flags = {"player-creation","placeable-neutral"},
+        max_health = 300,
+        corpse = 'big-remnants',
+        collision_box = {{-2.7,-2.7},{2.7,2.7}},
+        selection_box = {{-3.0,-3.0},{3.0,3.0}},
+        map_color = {r=0, g=0, b=1, a=1},
+        minable = {
+            mining_time = 1,
+            result = 'fi_solid_reactor_item',
+        },
+        fixed_recipe = 'fi_use_tech_fuel_recipe',
+        crafting_categories = {"fi_test_fuel_crafting_category"},
+        crafting_speed = 1,
+        energy_source = {
+            type = 'void',
+        },
+        energy_usage = "1W",
+        animation = {
+            filename = '__248k__/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_animation.png',
+            width = 960,
+            height = 960,
+            shift = {0, 0},
+            scale = 0.2,
+          },
+          working_visualisations = {
+            {
+                animation = {
+                    filename = '__248k__/ressources/fission/fi_solid_reactor/fi_solid_reactor_entity_animation_2.png',
+                    width = 960,
+                    height = 960,
+                    shift = {0, 0},
+                    scale = 0.2,
+                    line_length = 4,
+                    lines_per_file = 1,
+                    frame_count = 4,
+                    animation_speed = 0.1, 
+                }
+            }
+        },
+        working_sound = { 
+            sound = { filename ='__base__/sound/nuclear-reactor-1.ogg'},
+            apparent_volume = 2.5,
+        },
+    },
+    {
+        name = 'fi_test_fuel_crafting_category',
+        type = 'recipe-category',
+    },
+})
+
+
+
+--===================================================================================================================
+--                              structures and adding 
+--===================================================================================================================
+
+recipe_structure = {"recipe", "item", "item_amount"}
+tech_structure = {"tech", "pre_tech"}
+card_structure = {"tech", "card"}
+
+add_to_recipes(change_table_index(building_table, recipe_structure))
+add_to_recipes(change_table_index(item_table, recipe_structure))
+add_to_techs(change_table_index(tech_table, tech_structure))
+add_tech_cards(change_table_index(add_card_table, tech_structure))
+remove_pre_techs(change_table_index(pre_tech_table, tech_structure))
+remove_tech_cards(change_table_index(remove_card_table, card_structure))
+
diff --git a/settings.lua b/settings.lua
index eaa6ca6..3604088 100644
--- a/settings.lua
+++ b/settings.lua
@@ -183,4 +183,11 @@ data:extend({
         default_value   = true,
         order           = 'b',
     },
+    {
+        name            = 'overhaul_realistic_reactors',
+        type            = 'bool-setting',
+        setting_type    = 'startup',
+        default_value   = true,
+        order           = 'b',
+    },
 })
\ No newline at end of file