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05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted
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Category
LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT  and Licensee Event Report
Accession number
ML20237G971  +
CFR
10 CFR 50.73 +  and 10 CFR 50.72 +
Docket
05000412  +  and 00412  +
Equipment trip
Reactor Trip +
From
Lacey W +  and Duquesne Light Company +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +, 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +  and 05000412/LER-1987-010-01, :on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +
Hours
0.0268 d (0.643 hours, 0.00383 weeks, 8.808575e-4 months)  +, 0.0269 d (0.645 hours, 0.00384 weeks, 8.839015e-4 months)  +, 0 d (0 hours, 0 weeks, 0 months)  +, 0.0128 d (0.307 hours, 0.00183 weeks, 4.204525e-4 months)  +, 0.0198 d (0.474 hours, 0.00282 weeks, 6.495135e-4 months)  +, 0.0236 d (0.567 hours, 0.00337 weeks, 7.7622e-4 months)  +, 1.157407e-4 d (0.00278 hours, 1.653439e-5 weeks, 3.805e-6 months)  +  and 0.0117 d (0.281 hours, 0.00167 weeks, 3.84305e-4 months)  +
Issue date
August 18, 1987  +
LER number
10  +
LER year
1,987  +
Manufacturer
Westinghouse +
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>.
00:46:54, 23 May 2025  +
Page count
5  +
SSC
2RCS-RV551C +
Site
Beaver Valley +
Site license
NPF-64 +
Start date
August 18, 1987  +
State
Ohio +  and Washington +
System
Reactor Coolant System +  and Safety Relief Valve +
TS
TS-3.4.3 +
Title
:on 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted   +
Title:
On 870725,pressurizer Safety Valve 2RCS-RV551C Opened Prematurely.Caused by Improperly Shouldered Adjusting Bolt Resulting in Valve Lifting at Lower Pressure than Specified.Valve Setting Readjusted +
To
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) +
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::4121987010R01.pdf  +  and http://pbadupws.nrc.gov/docs/ML2023/ML20237G971.pdf  +
 
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