ML19330B364
| ML19330B364 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/10/1980 |
| From: | Walbridge W SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-80-06, IEB-80-6, NUDOCS 8007310477 | |
| Download: ML19330B364 (2) | |
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' SACRAMENTO MUNICIPAL UTILITY DISTRICT [] 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452-3211 June 10, 1980 Cyg s
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,%I Sp Mr. R. H. Engelken, Director t-C3 Region V, Office of Inspection 4
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U.S. Nuclear Regulatory Commission N~
Suite 202, Walnut Creek Pina N[2[j/
1990 North California Boulevard Walnut Creek, CA 94596 Docket 50-312 Rancho Seco Nuclear Generating Station, Unit No.1 IE Bulletin 80-06
Dear Mr. Engleken:
IE Bulletin 80-06 requested certain information regarding the
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Engineered Safety Feature (ESF) reset controls at Rancho Seco Unit No.1.
A review of electrical drawings has been made to determine that all equip-ment actuated by the Safety Features Actuation System remains in its emergency mode when the actuation signal has been reset.
Testing of the actual installed equipment at Rancho Seco has been completed for that equipment which can be tested when the plant is in operation.
The equipment tested and the test procedures used are listed below. This testing was not conducted specifically in response to the bulletin but the results satisfy the requests made in the bulletin. The remaining equipment cannot be tested until the plant is in a cold shudown condition, and we therefore cannot commit to perform this testing until the plant is in an extended shutdown or at the next refueling, whichever comes first.
Equipment Test Procedure P-236 Makeup Pump STP 843 P-238 High Pressure Injection STP 847 SFV-22023 Letdown Line STP 848 SFV-23604 Makeup Line STP 865E SFV-23809 High Pressure Injection STP 865A SFV-23810 High Pressure Injection STP 865B SFV-23811 High Pressure Injection STP 865C SFV-23812 High Pressure Injection STP 865D SFV-23645 Makeup Pump Recirculation STP 844 SFV-25003 Decay Heat Pump Suction STP 853 SFV-23508 Makeup Tank Isola:. ion STP 850 The above tests verified t'.1at 1) the operator could not take manual control of the device while the ESF signal was actuated, 2) that the device remained in the ESF state af ter the ESF signal was reset, and
- 3) that the operator could take manual control of the device after resetting the ESF signal.
1 8007310 477
1 Mr. Engelken June 10, 1980 The drawing review which has been completed and the testing done to date indicate that all safety related equipment remains in its emergency mode upon reset of a safety features signal at Rancho Seco.
For this reason, the District does not propose any modifications, design changes, or other corrective actions at this time.
If thc. remaining testing which is to be completed by the end of the next refue.I.ig outage indicates otherwise, the District will inform you of a proposed schedule for any corrective actions at that time.
Respectfully submitted, jdI A.
(e Wm. C. 'Walbridge-General Manager cc: Office of Inspection & Enforcement j
Division of Reactor Operations Inspection U.S. Nuclear Regulatory Commission Washington, D.C. 20555 me t is /N
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