05000270/LER-1979-005-03, /03L-0:on 790924,rod Block Gaseous Radiation Monitors Were Inoperable When Containment Isolation Valve on Monitor Return Line Failed Closed.Caused by Hole in Operator Diaphragm.Diaphragm Replaced
| ML19253B694 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 10/10/1979 |
| From: | Lewis S DUKE POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML16148A259 | List: |
| References | |
| LER-79-005-03L-02, LER-79-5-3L-2, NUDOCS 7910170247 | |
| Download: ML19253B694 (1) | |
| Event date: | |
|---|---|
| Report date: | |
| 2701979005R03 - NRC Website | |
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IThe RB gaseous radiation monitors were rendered inoperable when a containment l o.:
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, safety of the public were not endangered.
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iio i The valve failed due to a hole in its operator dic.phraga, which is believed
,to have exceeded its expected service life. The diaphragm was replaced, and
. Jhe valve was tested to verify operability. The preventive maintenance pro-pg gram will be revised to review ES valves to identify those with diaphragms ineeding replacement.
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