IR 05000397/1998021
| ML17284A802 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 11/05/1998 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML17284A800 | List: |
| References | |
| 50-397-98-21, NUDOCS 9811160121 | |
| Download: ML17284A802 (2) | |
Text
EXECUTIVE SUMMARY Washington Nuclear Project-2 NRC Inspection Report 50-397/98-21 This information covers a 6-week period of resident inspection with input from a senior reactor analyst.
~Oerations
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During a walkdown of the service water supply to the System A residual heat removal pump room cooler, the inspectors determined that the locking device to an isolation valve was unattached, contrary to plant procedures.
Since the valve was found in the correct position, no safety impact would have resulted.
This failure to properly lock the valve is a violation of minor significance and is not subject to formal enforcement action (Section 02.1).
~En ineerin
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The manual startup and shutdown of the reactor core isolation cooling system for level control, following the March 1998 main steam isolation valve closure, challenged the operators.
The proceduralized method to control reactor vessel level by diverting reactor core isolation cooling flow through the test return line could not be accomplished because of valve design deficiencies. The method used to maintain the reactor core isolation cooling system test return line isolation valves decreased the reliabilityof the system and challenged the containment isolation function since the valves may not have closed against high differential pressure.
Unresolved Item 50-397/98005-05, involving exclusion of the reactor core isolation cooling test return line valves from the scope of the maintenance rule, was determined not to be a violation of NRC requirements (EA 98-203) (Section M8.1).
9811ih012i 98iiOS PDR ADQCK 05000397
Washington Public Power Supply System l'
-3-VOV
- =
- -S E-Mail report to T. Frye (TJF)
E-Mail report to D. Lange (DJL)
E-Mail report to NRR Event Tracking System (IPAS)
E-Mail report to Document Control Desk (DOCDESK),
E-Mail report to Richard Correia (RPC)
E-Mail report to Frank Talbot (FXT)
bcc to DCD (IE01)
bcc distrib. by RIV:
Regional Administrator DRP Director Branch Chief (DRP/g Senior Project Inspector (DRP/E)
Branch Chief (DRP/TSS)
N Resident Inspector DRS-PSB MIS System RIV File DOCUMENT NAME: R:4 WN25WN821RP.COR To receive co of document, Indicate In box: "C" = Co without enclosures
"E" ~ Co with enclosures "N" = No co RIV:AC:DRP/E GAPick;df
98 OFFICIAL RECORD COPY