Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The Company’s unaudited condensed consolidated financial statements and related notes do not include notes and certain financial information normally presented annually under U.S. GAAP (“GAAP”), and therefore should be read in conjunction with the 2021 audited financial statements of NuScale LLC, and the notes thereto. Accounting measures at interim dates inherently involve greater reliance on estimates than at year-end. Although such estimates are based on management’s most recent assessment of the underlying facts and circumstances utilizing the most current information available, our reported results of operations may not necessarily be indicative of results that we expect for the full year. These financial statements are unaudited. In management’s opinion, they contain all adjustments of a normal recurring nature which are necessary to present fairly our financial position and our operating results as of and for the interim periods presented.
Principles of Consolidation	Principles of Consolidation As part of the Transaction, NuScale Corp has been determined to be the primary beneficiary of NuScale Power, LLC (“NuScale LLC”), a variable interest entity (“VIE”). As the sole managing member of NuScale LLC, NuScale Corp, has both the power to direct the activities, and direct ownership to share in the revenues and expenses of NuScale LLC. As such, all the activity of NuScale LLC has been consolidated in the accompanying condensed consolidated financial statements. All assets and liabilities included in the balance sheet are that of NuScale LLC, other than the NuScale Corp Warrants. All significant intercompany transactions have been eliminated upon consolidation.
Warrant Liability	Warrant Liability The Company accounts for the Warrants in accordance with the guidance contained in Accounting Standards Codification (“ASC”) 815, “Derivatives and Hedging”, under which the Warrants do not meet the criteria for equity treatment and must be recorded as liabilities. Accordingly, the Company classifies the Warrants as liabilities at their fair value and adjusts the warrants to fair value at each reporting period. This liability is subject to re-measurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s condensed consolidated statements of operations. The fair value of the Public and Private Placement Warrants has been estimated using the Public Warrants’ quoted market price. See note 5 for further discussion of the pertinent terms of the Warrants and note 6 for further discussion of the methodology used to determine the value of the Warrants.
Income Taxes	Income Taxes NuScale Corp accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that the deferred tax assets will be realized. Deferred tax assets and liabilities are calculated by applying existing tax laws and the rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the year of the enacted rate change. The Company accounts for uncertainty in income taxes using a recognition and measurement threshold for tax positions taken or expected to be taken in a tax return, which are subject to examination by federal and state taxing authorities. The tax benefit from an uncertain tax position is recognized when it is more likely than not that the position will be sustained upon examination by taxing authorities based on technical merits of the position. The amount of the tax benefit recognized is the largest amount of the benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The effective tax rate and the tax basis of assets and liabilities reflect management’s estimates of the ultimate outcome of various tax uncertainties. Once identified, the Company will recognize penalties and interest related to uncertain tax positions within the provision (benefit) for income taxes line in the accompanying consolidated statements of operations. NuScale LLC is a limited liability company treated as a partnership for U.S. federal income tax purposes that is not subject to U.S. federal income tax. As such, its net taxable income or loss and any related tax credits are allocated to its members.
Fair Value Measurement	The Company measures certain financial assets and liabilities at fair value. Fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company uses a three-level hierarchy, which prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach and cost approach). The levels of hierarchy are described below: Level 1 Quoted prices in active markets for identical instruments; Level 2 Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and Level 3 Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. Financial assets and liabilities are classified in their entirety based on the most stringent level of input that is significant to the fair value measurement. The carrying amount of certain financial instruments, including deposits, accounts payable, accrued expenses and convertible notes payable approximates fair value due to their short maturities. Our Warrants are accounted for as liabilities pursuant to ASC 815-40 and are measured at fair value as of each reporting period. Changes in fair value of the Warrants are recorded in the statement of operations each period. Due to the similarity of the features of the Public and Private Warrants, management has concluded that the price of the Public Warrants would be used in the valuation of the Private Placement Warrants. However, since the two types of Warrants are not identical and the Private Warrants are not actively traded, we have classified the Private Placement Warrants as Level 2, while the Public Warrants are classified as Level 1.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The Company’s unaudited condensed consolidated financial statements and related notes do not include notes and certain financial information normally presented annually under U.S. GAAP (“GAAP”), and therefore should be read in conjunction with the 2021 audited financial statements of NuScale LLC, and the notes thereto. Accounting measures at interim dates inherently involve greater reliance on estimates than at year-end. Although such estimates are based on management’s most recent assessment of the underlying facts and circumstances utilizing the most current information available, our reported results of operations may not necessarily be indicative of results that we expect for the full year.

These financial statements are unaudited. In management’s opinion, they contain all adjustments of a normal recurring nature which are necessary to present fairly our financial position and our operating results as of and for the interim periods presented.

Principles of Consolidation

As part of the Transaction, NuScale Corp has been determined to be the primary beneficiary of NuScale Power, LLC (“NuScale LLC”), a variable interest entity (“VIE”). As the sole managing member of NuScale LLC, NuScale Corp, has both the power to direct the activities, and direct ownership to share in the revenues and expenses of NuScale LLC. As such, all the activity of NuScale LLC has been consolidated in the accompanying condensed consolidated financial statements. All assets and liabilities included in the balance sheet are that of NuScale LLC, other than the NuScale Corp Warrants. All significant intercompany transactions have been eliminated upon consolidation.

Warrant Liability

The Company accounts for the Warrants in accordance with the guidance contained in Accounting Standards Codification (“ASC”) 815, “Derivatives and Hedging”, under which the Warrants do not meet the criteria for equity treatment and must be recorded as liabilities. Accordingly, the Company classifies the Warrants as liabilities at their fair value and adjusts the warrants to fair value at each reporting period. This liability is subject to re-measurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s condensed consolidated statements of operations. The fair value of the Public and Private Placement Warrants has been estimated using the Public Warrants’ quoted market price. See note 5 for further discussion of the pertinent terms of the Warrants and note 6 for further discussion of the methodology used to determine the value of the Warrants.

Income Taxes

NuScale Corp accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that the deferred tax assets will be realized. Deferred tax assets and liabilities are calculated by applying existing tax laws and the rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the year of the enacted rate change.

The Company accounts for uncertainty in income taxes using a recognition and measurement threshold for tax positions taken or expected to be taken in a tax return, which are subject to examination by federal and state taxing authorities. The tax benefit from an uncertain tax position is recognized when it is more likely than not that the position will be sustained upon examination by taxing authorities based on technical merits of the position. The amount of the tax benefit recognized is the largest amount of the benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The effective tax rate and the tax basis of assets and liabilities reflect management’s estimates of the ultimate outcome of various tax uncertainties. Once identified, the Company will recognize penalties and interest related to uncertain tax positions within the provision (benefit) for income taxes line in the accompanying consolidated statements of operations.

NuScale LLC is a limited liability company treated as a partnership for U.S. federal income tax purposes that is not subject to U.S. federal income tax. As such, its net taxable income or loss and any related tax credits are allocated to its members.

Fair Value Measurement

The Company measures certain financial assets and liabilities at fair value. Fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company uses a three-level hierarchy, which prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach and cost approach).

The levels of hierarchy are described below:

Level 1 Quoted prices in active markets for identical instruments;

Level 2 Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and

Level 3 Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. Financial assets and liabilities are classified in their entirety based on the most stringent level of input that is significant to the fair value measurement.

The carrying amount of certain financial instruments, including deposits, accounts payable, accrued expenses and convertible notes payable approximates fair value due to their short maturities.

Our Warrants are accounted for as liabilities pursuant to ASC 815-40 and are measured at fair value as of each reporting period. Changes in fair value of the Warrants are recorded in the statement of operations each period. Due to the similarity of the features of the Public and Private Warrants, management has concluded that the price of the Public Warrants would be used in the valuation of the Private Placement Warrants. However, since the two types of Warrants are not identical and the Private Warrants are not actively traded, we have classified the Private Placement Warrants as Level 2, while the Public Warrants are classified as Level 1.