ML17206A595
| ML17206A595 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/05/1979 |
| From: | Ugrig R FLORIDA POWER & LIGHT CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| L-79-3, NUDOCS 7901090229 | |
| Download: ML17206A595 (3) | |
Text
REGULAT Y INFORMATION DISTRIBUTIO>
YSTEM (RIDS)
ACCESSION NBRs 7901090229 DOC.DATEs 79/01/05 NOTARIZEDs NO FACILs50-335 SAINT LUCIE ¹1, FLORIDA POWER 8 LIGHT CO..
AUTH.NAME AUTHOR AFFI L'IATION UGR IG, R.E.
FLORIDA POWER 8
LIGHT CO.
RECIP.NAME RECIPIFNT AFFILIATION REID, R.W.
- OPERATING REACTORS BRANCH 4 SUBJFCT-Responds to 781129,1tr.Containment purging during operation is under study 8, co will notify NRC of progress by 790201.
Safetuy actuation signal circuits which incorporate manual override'.feature were reviewedl operator control is adequate.
DOCKET ¹ 05000335 NOTES s DISTRIBUTION CODEs A001S COPIES RECEIVEDsLTR ~ ENCL ~
SIZE-TITLE-GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LIC ACTION s
~ I NTERNAL-'
XTERNALs
',.'0 RECIPIENT ID CODE/NAME 05 BC Dg.
0.
12 I8E 15 CORE.PERF BR 17 ENGR BR 19 PLANT SYS BR 21 EFLT TRT SYS 03 LPDR 23 ACRS C()PI ES LTTR ENCL I
2 1
1 1
1
.1 16 1
RECIPIENT ID CODE/NAME 02 NRC PDR 14 HANAUER 16 AD SYS/PROJ 18 REAC SFTY BR 20 FEB 22 BRINKMAN 04 NSIC COP I ES LTTR ENCL
~AN 2'0 )yg BEG(jj )TO ~Y DOnlPET'E COPY 0
0 TOTAL NUMBER OF COPIES REQUIRED-LTTR 38 ENCL
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P.O. BOX 529100, MIAMI,FL 33152 y9 l/g~
FLORIDA POWER & LIGHT COMPANY January 5,
1979 L-79-3 Office of Nuclear Reactor Regulation Attention:
Mr.
R.
W. Reid, Chief Operating Reactors Branch 84 Di vis ion of Operating Reactors U. S. Nuclear Regulatory ComIission Washington, D.
C.
20555
Dear Mr. Rei d:
Re:
St. Lucie Unit 1
Docket No. 50-335 Containment Pur in We have received your letter of November 29, 1978.
Our engineering review is in progress but we have not yet determined which option to pursue with respect to containment purging during operation.
We are proceeding with the determination and will inform you of our progress by February 1, 1978.
We have also reviewed the design of safety actuation signal circuits that incorporate a manual override feature.
The review confirmed that existing physical features adequately facilitate administrative control.
Override actuations are annunciated at the system level, and overriding one safety actuation signal does not also cause the bypass of any other safety actuation signal.
Key operated bypass switches are located in the Control Room and are observable by the operators.
Only one key exists for a gi ven trip function and fits all four channels of that function.
Since only one channel at a time can be bypassed, the safety actuation function cannot be manually overridden.
Very truly yours, Robert E. Uhri g Vice President Advanced Systems and Technology REU/MAS/cpc Attachment cc:
Mr. James P. O'Reilly, Region II Harold F. Reis, Esquire Al
=CO-Pg 7 9 010 90 AP-0<
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