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Financial Instruments with Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2021
Risks and Uncertainties [Abstract]
Financial Instruments with Concentrations of Credit Risk	FINANCIAL INSTRUMENTS WITH CONCENTRATIONS OF CREDIT RISK The primary customer of our Nuclear Operations Group and Nuclear Services Group segments is the U.S. Government, including some of its contractors. Our Nuclear Power Group segment's major customers are large utilities. These concentrations of customers may impact our overall exposure to credit risk, either positively or negatively, in that our customers may be similarly affected by changes in economic or other conditions. In the years ended December 31, 2021, 2020 and 2019, U.S. Government contracts accounted for approximately 76%, 77% and 77% of our total consolidated revenues, respectively. Accounts receivable due directly or indirectly from the U.S. Government represented 68% and 83% of net receivables at December 31, 2021 and 2020, respectively. See Note 15 and Note 3 for additional information about our operations in different geographic areas. We believe that our provision for possible losses on uncollectable accounts receivable is adequate for our credit loss exposure. At December 31, 2021 and 2020, the allowances for possible losses that we deducted from Accounts receivable – trade, net on our consolidated balance sheets were $0.2 million.

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- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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- References

No definition available.

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