ML19305C318
| ML19305C318 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 03/21/1980 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8003260526 | |
| Download: ML19305C318 (2) | |
Text
esuun SACRAMENTO MUNICIPAL UTILITY olsTRICT C 6201 s street. Box 15830, sacramento. Cahfornia 95813; (916) 452 3211 March 21,1980 Director of Nuclear Reactor Regulation Attention: Mr. Robert W. Reid, Chief Operating Reactors, Branch 4 U. S. Nuclear Regulatory Conmission Washington, D. C.
20555 Docket 50-312 Rancho Seco Nuclear Generating Station, Unit 1
Dear Mr. Reid:
In response to the three telecopied questions submitted by Mr. M. Fairtile (NRR) to Mr. D. Raasch (SMUD), your attentica is directed to the Wm. C. Walbridge letter with attached report to Harcid Denton dated March 12, 1980. Each of these questions is addressed in t'ae March 12, 1980 Report as indicated below:
Question 1:
Actions which will allow the operator to cope with various combinations of loss of instrumentation and control functions.
This includes changes in (A) equipment and control systems to give clear indications of functions which are lost or unreliable; (B) procedures and training to assure positive and safe manual response by the operator in the event that competent instruments are unavailable.
Response
Refer to Paragraph 31, 3j, 4 and 5 of the March 12th Report.
Question 2:
Verification of the effects of various combinations of loss of instrumentatior. and control functions by design review analysis and by test.
Response
Refer to Paragraphs 31, 4, and 5 of the March 12th Report.
Question 3:
Correction of electrical deficiencies which may allow the power operated relief valve and pressurizer spray valve to open on non-nuclear instrumentation power failures, such as, the event which occurred at Crystal River 3 on 2/26/80.
Response
Refer to Paragraphs 6b and 6c of the March 12th Report.
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Mr. Robert W. Reid March 21,1980 The actions provided in our responses to Questions 1, 2 and 3 above will all be completed prior to return to power.
If you have any further questions concerning this reply, please contact us.
Sincerely, f
ohn J. Mattimoe Assistant General Manager and Chief Engineer i
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