ML20207N604
| ML20207N604 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/12/1988 |
| From: | Keuter D SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 88-16, AGM-NPP-88-542, NUDOCS 8810190249 | |
| Download: ML20207N604 (2) | |
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Q bSMUD SACAAMeNTO MUN4CIPAL UTIUTY 068TmCT C P. O. Box 15830. Sectarrento CA 95852 1830.1916) 452 3211 AN ELECTrlC SYSTEM SERVING THE HEART 05 CALIFORNIA AGM/NPP 88-542 i
October 12, 1988 U. O. Nuclear Regulatory Commission Attn:
J. B. Martin, Regional Administrator Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596 l
i Docket No. 50-312 i
Rancho Jaco Nuclear Generating Station License No. OPR-54 i
SPECIAL REPORT NUMBER 88-16:
POST ACCIDENT SAMPLING SYSTEM INOPERABLE MORE THAN 72 HOURS i
Dear Mr. Martin:
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The Post Accident Sampling System was not restored to operable status within i
the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> specified in administrative controls in support of Rancho Seco t
7 Technical Specification 6.18.
The Sacramento Municipal Utility Olstrict J
hereby submits Special Report No. 88-16 in accordance with Rancho Seco i
administrative controls.
Members of your staff with questions requiring additional information or f
clarification may contact Mr. Robert Fraser at (209) 333-2935, extension 4364.
l Sincerely,
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Dan R. Keuter Assistant General Manager Nuglear Power Production Attachment cc w/atch: Document Control Desk, Washington OC A. D'Angelo NRC, Rancho Seco
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RANCHO SECo NUCLEAR GENERATING STATION O 1444o Two Cities Soad. Hertid. CA 95638 9799:1209) 333 2935
SPECIAL REPORT NUMBER (4 16 Post Accident Sampling System Inoperable More Than 72 Hours Date of Occurrence September 18, 1988 Plant Conditions at Time of Occurrence The plant was operating at approximately 92% power on September 18, 1988.
l Jdentif tatiga of Occurttatt The Post Accident Sampling System was not returned to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> as required by Rancho Seco Administrative Procedure RSAP-0219.
Descriotion of Occurrence On September 15, 1988, a work clearance was issued to allow removal of Pressure Control Valve PCV-70022 for maintenance.
PCV-70022 provides pressure control for the Post Accident Sampling System dilution / flush water from the Miscellaneous Water Holdup Tank T-993.
To isolate PCV-70022 clearance tags were placed on additional vgives which disabled the flow path for the backup dilution / flush water from Chilled Hater Tank T-496. Without a source of dilution / flush water the system became inoperable.
Corrective Action Taken On September 30. 1988, backup dilution / flush water capability from T-496 was restored to return the system to operable status.
Restoration of the normal dilution / flush water capability from T-993 will be accomplished on receipt of parts for rework of PCV-70022.
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