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05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program
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Category
LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT  and Licensee Event Report
Accession number
ML20091C929  +
CFR
10 CFR 50 Appendix A +, 10 CFR 50.73#a2vii +  and 10 CFR 50.73#a2T +
Docket
05000336  +  and 00336  +
From
Scace S +, Bates R +, NORTHEAST UTILITIES +  and Northeast Nuclear Energy +
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05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +, 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +  and 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +
Hours
0.019 d (0.457 hours, 0.00272 weeks, 6.259225e-4 months)  +
Issue date
April 1, 1992  +
LER number
6  +
LER year
1,992  +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
17:39:26, 13 December 2024  +
Page count
5  +
Procedure
AM +, ES +, RT +, CH-515 +, CH-516 +, CH-089 +  and MP-92-348 +
Reporting criterion
10 CFR 50.73(a)(2) +  and 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability +
Site
Millstone +
Site license
Millstone +
Start date
April 1, 1992  +
Title
:on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program   +
Title:
On 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program +
To
Office of Information Resources Management +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.
https://lersearch.inl.gov/Index.aspx?Page=PDFView?Doc::3361992006R01.pdf  +  and http://pbadupws.nrc.gov/docs/ML2009/ML20091C929.pdf  +
 
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