ML17199F677
| ML17199F677 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Peach Bottom, Brunswick, 05000000 |
| Issue date: | 01/09/1986 |
| From: | Leeds E NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Seyfrit K NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| References | |
| AEOD-E601, NUDOCS 8603120388 | |
| Download: ML17199F677 (2) | |
Text
JAN 0 9 19,
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MEMORANDUM FOR; Kar 1 V. Seyfrit,.Ch*i ef
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FROM: i * < ~-. *:. "):'*1 Ef:i ~ '.J '.1 Le:eds~, 'R.eactof,*systems Engineer
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SUBJECT:
DEFICIENT OPERATOR ACTIONS FOLLOWING DUAL
~UNCTION VALVE FAILURES AEOD/E "PI
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Enclosed is an eng;inee*ring evaluation report concerning several recent events involving deficient oper~tor attions following the failure of dual function (i.e., emergency core cooling system/containment isolation) valves.
The study found that light water ~eactors are generally equipped with a number of valves which perform both an emergency core cooling (or safety-related) function and a containment isolation function.
However, operating experience shows that the proper and conservative operator action for a f~ilure of one of these valves has not always been taken by the operating *staff in a manner which is fully consistent with the plant's technical specifications. It is suggested, therefore, that the Office of Inspection and Enforcement consider issuing an information notiCe which discusses the recent events involving deficient operator actions following dual function valve failures.
The study also suggests that the Office of Nuclear Reactor Regulation request all licensees f' p '&..
to examine their plant piping configurations and ensure that the dual function valves are also appropriately identified in the plant technical specifications table of containment isolation valves.
Finally, it is suggested that the Office 8603120388 860109.
PDR. ADOCK 05000249 S
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.I of Nuclear Reactor Regulation review the adequacy of the Peach Bottom technical specifications for the containment cooling subsystem and, if warranted, revise the technical specifications as necessary.
Enclosures:
As Stated DISTRIBUTION:
PDR AEOD SF ROAB SF ROAB CF Eleeds SRubin KS~eyfri t Wlanning FHebdon KB lack CHeltemes, Jr.
- 1/ /86 OFFIC AL RECORD
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Eric %:~d~ Reactor Systems Engineer Reactor Systems Section 1 Reactor Operations Analysis Branch Office for Analysis and Evaluation of Operational Data
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