ML19329A319
| ML19329A319 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/04/1974 |
| From: | Jennifer Davis US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Morris P, Moseley N, James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II), US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8001020892 | |
| Download: ML19329A319 (1) | |
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SEP 4 1974 j
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P. A. Morris, Director, Office of Operations Evaluation j
J. P. O'Ecilly, Director, Region I N. C.' Hoseley, Director, Pagion II j
J. C. Kappler, Director, Ragion III E. M. Howard, Director, Region IV 1
R. H. Engelken, Director, Region V PROPOSED BULLETIN - lilSAPPLICATION OF CRANE COMPANY I
TEN-INCH VALVE We propose to issue the enclosed Bulletin the week of Septe:nber 9, E
i 1974.
Your commnts will be appreciated prior to close of business Regional cousnents may be called to the September 11, 1974.
appropriate Regional Coordinator.
i Original nigned liy,
- 3. C. Davis John C. Davis, Deputy Director for Field Operations
Enclosure:
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- MISAPPLICATION OF CRANE COMPANY 10 INCH 300 POUND
~o CAST ALLOY STEEL VALVE - CATALOG NUMBER 151 1/2 LU.
A recent unusual event report submitted by a licensee of a PWR plant, l
supplied by B&W, indicated the failure of valve internals in a valve This has been the third failure in the low pressure! injection system.
of this nature in a two year period.
A.
Description of Circumstances The low pressure injection system was being operated in the decay heat removal mode when it was noted that flow could not be throttled below 4000 gpm. The system had been in operation for Visual inspection an extended period at flows less than 3000 gpm.
of the valve revealed that the guide pin on the base of' the valve disc had broken off. Previous failures had been uith the disc
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guide bar and the disc guide pin.
The valve manufacturer advised the licensee that this valve was not intended for regulating service. Operation in a regulating
-mode causes vibration and/or cavitation and results in failure.
B.
Action Requested Please supply this office, in writing within 30~. days af ter receipt i
of this bulletin, the following requested information:
- 1. Are similar valves used in any safeguard system in your facility?
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- 2. Are they used as flow regulating or throttle valves?
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- 3. If the valves are used for flow regulation or as throttle valves, i
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4 ii what action have you taken or do you plan to take to min m ze the potential for failure of valve internals?
- 4. If this bulletin does not apply to your f acility, a negative l
report is requested.
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