ML17298C088
| ML17298C088 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/25/1985 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| ANPP-32496-EEVB, NUDOCS 8504290419 | |
| Download: ML17298C088 (10) | |
Text
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REGULATOR INFORMATION DISTRIBUTION TEM (RIDS)
ACCESSION NBR;850 FACIL'STN 50 528 STN 50~529 STN 50 530 AUTH'AME=
VAN BRUNTgE;ED REC IP ~ NAME KNIGHTONg G ~ W ~
4290419 DOG,DATE: 85/04/25 NOTARIZED: YES Palo Verde Nuclear Station~
Unit li Ar)zona Publ,i Palo Verde Nuclear Station~. Unit 2~ Ar)zona Publ,f Palo Verde Nuclear Station< Unit 3i Arizona Publi AUTHOR AFFILIATION Arizona Public Service Co, RECIPIENT AFFILIATION Licensing Branch 3
DOCKE~T>> 0 05000528 05000529 05000530
SUBJECT:
For wards evaluation confirming compliance w/App R
requirements re capability to achieVe 8 maintain cold shutdown within 72' of control room fire procedures.
41AO-1ZZ44 need not be revised~per discussions w/P Qua-lls",
DISTR IBUTION CODE' A006D COP IES RECE'I VED L'TR
"'NCL S IZE'$
TITLE't= OR Submittal: Fire, Protection NOTES:Standardized plant.
OL:.1 2/31/84 Standardized plant ~
Standardized
- plant, MOP WM 05000528 05000529 05000530 RECIPIENT ID CODE/NAME NRR-LB3 BC Ol COPIES LTTR ENCL 3
RECIPIENT ID CODE'/NAME COPIES LTTR ENCL<
INTERNAL: ACRS 11 ELD/HDS3 NRR-HOLONICH 07 B
09 EG FILE 04 3
3 1
0 2
2 2
2 1
1 ADM/LFMB IE WHITNEYg L NRR WAMBACH 06 NRR/DL D IR RGN5-1 1
1 1
1 0
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TOTAL NUMBER OF COPIES REQUIRED+
LTTR 20 ENCL 17
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Arizona Nuclear Power Project P.o. BOX 52034 e
PHOENIX, ARIZONA85072-2034 Director, Nuclear Reactor Regulation Attention:
Mr. George W. Knighton, Chief Licensing Branch No.
3 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 ANPP-32496-EEVB/TFQ April 25, 1985
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2 and 3
Docket Nos.
STN 50-528 (License No. NPF-34)/529/530 Appendix R. Compliance (Achieve and Maintain Cold Shutdown within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.)
File:
85-056-026'.1.01.10
Reference:
Letter from D. F. Kirsch, NRC-Reg.
V, to E. E.
Van Brunt, Jr.,
- APS, dated April 4, 1985.
Dear Mr. Knighton:
In response to an open item from the March 4-8, 1985, Appendix R Audit conducted by NRC Region V, as documented in the reference letter, an evaluation is provided to confirm that the PVNGS complies with the requirements of 10CFR50, Appendix R, with regard to capability to achieve and maintain cold shutdown within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> of a control room fire.
Cold Shutdown, as defined by the PVNGS Unit 1 Technical Specifications, is sub-critical (K eff <0.99), zero power, and Cold Leg Temperature
< 210'F.
The open item was the result of the audit team's review of the Shutdown Outside the Control Room due to Fire and/or
- Smoke, PVNGS Procedure No. 41AO-1ZZ44.
This procedure did not require the operators to achieve cold shutdown conditions within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and it also requires a 55 hour6.365741e-4 days <br />0.0153 hours <br />9.093915e-5 weeks <br />2.09275e-5 months <br /> soak time at Tc=300'F to preclude Reactor Vessel Upper Head voiding during depressurization.
This procedure, in conjunction with the PVNGS Technical Specifications, was discussed with the audit team, and it was shown that cold shutdown conditions could be achieved in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
Table A and its footnotes provide the summary of the procedure using the alternate shutdown capability.
As shown on Table A, even with a temperature soak of 55 hours6.365741e-4 days <br />0.0153 hours <br />9.093915e-5 weeks <br />2.09275e-5 months <br />, cold shutdown can be achieved in 61 hours7.060185e-4 days <br />0.0169 hours <br />1.008598e-4 weeks <br />2.32105e-5 months <br /> with equipment which is independent of the control room, which is where the fire is assumed to occur.
Therefore, the requirement of 10CFR50, Appendix R, Section III.Lis met and the current plant procedure, 41A0-1ZZ44, need not be revised to support the information provided in Table A.
- Also, we believe the procedure should not require cold shutdown be achieved within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
This has been discussed with Mr. Phil Quails, NRC-Region V, and he concurs that the intent of the inspection report was for ANPP to demonstrate that cold shutdown could be achieved per the requirement of 10 CFR 50, Appendix R, Item III.L, not to require by procedure that cold shutdown be achieved within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
85042 F0419 850425 PDR ADOCK 05000528 F
PDR s )
L
Mr. George M. Knighton,'Chief Appendix R. Compliance ANPP-32496 Page 2.
Please contact Mr. W.'. Quinn of my staff if you have any questions.
Very truly ou E. E.
Van Brunt, Jr.
Executive Vice President Project Director EEVB/TFQ/das cc:
E. A. Licitra R. P.
Zimmerman P. Quails A. C. Gehr (all w/a)
r.
STATE OF ARIZONA
)
)
Sse COUNTY OF HARICOPA)
I, Edwin E.
Van Brunt, Jr.,
represent that I am Executive Vice President, Arizona Nuclear Power Project, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, that I have read such document and know its contents, and that to the best of my knowledge and belief, the statements made therein are true.
Sworn to before me this ~
day of Edwin E.
Van Brunt, Jr.
) 1985.
My Commission Expires:
My Commission Expires Nov. 12, 1988 Notary Pub
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TABLE A Summary of the Shutdown Outside the Control Room due to Fire and/or Smoke (PVNGS Procedure No. 41AO-1ZZ44)
Tem erature 565'F(
) to 300'F 300'F(
300 F Pressure 2250 psia 2250 psia 2250 psia to 450 psia Cooldown Rate 60'F/hr(b)
O'/hr N/A Depressurization Rate N/A N/A 0.7 psi/sec(
)
Duration
~hr.
4.4 55(d) 0.7 300'F to 210'F 450 psia 100'F/hr(f)
N/A 0.9 Total 61 hours7.060185e-4 days <br />0.0169 hours <br />1.008598e-4 weeks <br />2.32105e-5 months <br /> Footnotes:
(a)
Normal operating cold leg temperature.
(b)
Maximum cooldown rate as specified by 41A0-1ZZ44, Step 4.7.
(c)
Hold temperature as specified by 41A0-1ZZ44, Step 4.8 to allow the reactor vessel head to cool and to preclude upper head voiding during depressurization.
(d)
(e)
Duration to reduce plant conditions from normal operating conditions (565'F, 2250 psia) to shutdown cooling system entry conditions (300'F, 450 psia) under natural circulation conditions.
Reference:
Letter from A. E. Scherer, CE, to D. G. Eisenhut, NRC, dated August 12, 1983 (CESSAR Docket No.
STN 50-470F).
Depressurization rate available with auxiliary spray system, assuming only one charging pump operating and letdown isolated.
Reference:
CEN-239 "Depressurization and Decay Heat Removal;
Response
to NRC Questions" prepared for the CE Owners Group by CE, dated June, l983.
(f)
Maximum cooldown rate as specified by Technical Specification 3.4.8,1.
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