ML20042E692
| ML20042E692 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 03/30/1990 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| Shared Package | |
| ML20042E497 | List: |
| References | |
| 90-06, 90-6, NUDOCS 9004300320 | |
| Download: ML20042E692 (1) | |
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SPECIAL REPORT NLMBER 90-06 i
Fire Barriers Breached More Than 7 Days i
l Date of Occurrence See Table 1.
Plant Conditions at Time of Occurrence i
The plant is in a defueled condition.
Identification of Occurrence The fire barrier penetrations in the Auxiliary Building listed in Table I were not restored to operable status within the 7 days required by Rancho Seco Technical Specification 3.14.6.2.-
l TABLE 1 Fire Barriers In The Auxiliary Building That Failed.SP.0712 Date Returned Date of Penetration Operable l
Occurrence Penetration Elevation Failed Status t
3/1/90 16-31 AB 20'-0" 2/22/90 I
3/1/90 16-31AA 20'-0" 2/22/90 3/6/90 17-31AI 20'-0" 2/27/90 3/14/90 34-36AA 13'-6" 3/7/90 3/16/90 3/14/90 3133 0'-0" 3/7/90 3/16/90 3/14/90 34-36AG 3/7/90 3/16/90 Description of Occurrence
'f The penetrations listed in Table 1 failed surveillance test SP.0712, Refueling Interval Fire Barrier Penetrations (Auxiliary Building, Ground Floor Level and Turbine Building O'-0" Elev) due to seal degradation.
Corrective Action Taken Operability of fire detectors was verified on at least one side of the breached barriers and hourly fire watches established in accordance with Technical Specification 3.14.6.2.
Three penetrations have been returned to operable status as noted in Table 1.
Hourly fire watches will continue as s
required until the remaining penetrations are returned to operable status.
r 9004300320 900330 ADOCKOSOOg2 DR
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