    <SEC-DOCUMENT>0001822966-25-000146-index.html : 20250924
    <SEC-HEADER>0001822966-25-000146.hdr.sgml : 20250924
    <ACCEPTANCE-DATETIME>20250924163655
    ACCESSION NUMBER:		0001822966-25-000146
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		17
    CONFORMED PERIOD OF REPORT:	20250922
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20250924
    DATE AS OF CHANGE:		20250924

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NUSCALE POWER Corp
    		CENTRAL INDEX KEY:			0001822966
    		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED PLATE WORK (BOILER SHOPS) [3443]
    		ORGANIZATION NAME:           	04 Manufacturing
    		EIN:				852715384
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39736
    		FILM NUMBER:		251338907

    	BUSINESS ADDRESS:
    		STREET 1:		1100 NE CIRCLE BLVD., SUITE 200
    		CITY:			CORVALLIS
    		STATE:			OR
    		ZIP:			97330
    		BUSINESS PHONE:		(971) 371-1592

    	MAIL ADDRESS:
    		STREET 1:		1100 NE CIRCLE BLVD., SUITE 200
    		CITY:			CORVALLIS
    		STATE:			OR
    		ZIP:			97330

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	SPRING VALLEY ACQUISITION CORP.
    		DATE OF NAME CHANGE:	20200828
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>smr-20250922.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: smr-20250922.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>2
    <FILENAME>a3-partyagreementforsale.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 2 - file: a3-partyagreementforsale.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>smr-20250922.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: smr-20250922.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>smr-20250922_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: smr-20250922_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>smr-20250922_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: smr-20250922_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>a3-partyagreementforsale001.jpg
    <TEXT>
    Document 6 - file: a3-partyagreementforsale001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>a3-partyagreementforsale002.jpg
    <TEXT>
    Document 7 - file: a3-partyagreementforsale002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>a3-partyagreementforsale003.jpg
    <TEXT>
    Document 8 - file: a3-partyagreementforsale003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>a3-partyagreementforsale004.jpg
    <TEXT>
    Document 9 - file: a3-partyagreementforsale004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: FilingSummary.html

    Document 15 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>17
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>18
    <FILENAME>0001822966-25-000146-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: 0001822966-25-000146-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>smr-20250922_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: smr-20250922_htm.html

    Document 19 - RAW XML: smr-20250922_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>