ML19338G502
| ML19338G502 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 08/28/1980 |
| From: | Walbridge W SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-80-16, NUDOCS 8010300680 | |
| Download: ML19338G502 (2) | |
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~r SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 s street, Box 15830, Sacramento, California 95813; (916) 452-3211
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D Mr. R. H. Engelken,-Director Id Region V, Office of Inspection Nke and Enforcement U.S. Nuclear Regulatory Commission Suite 202, Walnut Creek Plaza 1990 North California Boulevard Walnut Creek, CA 94596 Docket 50-312 Rancho Seco Nuclear Generating Station, Unit 1 IE Bulletin 80-16 Addendum
Dear Mr. Engelken:
Review of our letter dated July 25, 1980, responding to IE Bulletin 80-16 results in the following information to supplement that response.
SMUD has investigated the Rosemont transmitter application at Rancho Seco per our letter and has determined that the transmitter's i
function is not safety related. The reason for this statement is:
- 1.
The transmitter's function is to provide an automatic closure signal for valve HV20002 at a pressure of 250 psig. Once the valve closes, it will not automatically reopen for any signal from this transmitter.
2.
To open the valve the pressure must be below th'e set point, and the operator must manually demand the valve to open.
3.
If the valve were opened, Locked Closed valves are installed downstream of this valve to isolate this line from the Safety Features portion 'of the system.
Therefore, low pressure injection could not be defeated.
4.
Long term circulation through this valve to prevent baron precipitation would not be affected since this is a low pressure operation below the failure point 4
of the transmitter.
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Mr. R. H. Engelken, Director August 28, 1980 Based on these facts, the District has determined that no further action is necessary.
Si ncere'ly,
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Wm. C. Walbridge j-General Manager cc:
Division of Reactor Operations Inspection Office of Inspection and Enforcement U.S. fluclear Regulatory Commission Washington, D.C.
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