ML17298C088

Forwards Evaluation Confirming Compliance W/App R Requirements Re Capability to Achieve & Maintain Cold Shutdown within 72 H of Control Room Fire.Procedures 41A0-1ZZ44 Need Not Be Revised,Per Discussions W/P Qualls

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

r.

REGULATOR INFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR;850 4290419 DOG,DATE: 85/04/25 NOTARIZED: YES DOCKE~T>> 0 FACIL'STN 50 528 Palo Verde Nuclear Station~ Unit li Ar)zona Publ,i 05000528 STN 50~529 Palo Verde Nuclear Station~. Unit 2~ Ar)zona Publ,f 05000529 STN 50 530 Palo Verde Nuclear Station< Unit 3i Arizona Publi 05000530 AUTH'AME= AUTHOR AFFILIATION VAN BRUNTgE;ED Arizona Public Service Co, REC IP ~ NAME RECIPIENT AFFILIATION KNIGHTONg G ~ W ~ Licensing Branch 3

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' A 006D COP I ES RECE'I VED L'TR "'NCL S IZE'$ MOP W M TITLE't= OR Submittal: Fire, Protection NOTES:Standardized plant. 05000528 OL:.1 2/31/84 Standardized plant ~ 05000529 Standardized plant, 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE'/NAME LTTR ENCL<

NRR- LB3 BC Ol 3 INTERNAL: ACRS 11 3 3 ADM/LFMB 1 0 ELD/HDS3 1 0 IE WHITNEY g L 1 1 NRR- HOLONICH 07 2 2 NRR WAMBACH 06 1 0 B 09 2 2 NRR/DL D IR 1 EG FILE 04 1 1 RGN5- 1 1 EXTERNAL'PDR 03~ 1 1 NRC PDR 02' 1 NSIC 05% 1 1 TOTAL NUMBER OF COPIES REQUIRED+ LTTR 20 ENCL 17

'E It t lt I

~ '

Arizona Nuclear Power Project P.o. BOX 52034 e PHOENIX, ARIZONA85072-2034 Director, Nuclear Reactor Regulation ANPP-32496-EEVB/TFQ Attention: Mr. George W. Knighton, Chief April 25, 1985 Licensing Branch No. 3 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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 hours.)

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.L is 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 (all w/a)

R. P. Zimmerman P. Quails A. C. Gehr

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.

Edwin E. Van Brunt, Jr.

Sworn to before me this ~ day of ) 1985.

Notary Pub My Commission Expires:

My Commission Expires Nov. 12, 1988

4'1 V

PL'la'J ~33 4,,

4'QD

\ && 7 ~ ~ 44

'1-"DR )0 38 9L<Oi'Der~..i 9 "X e k r P 4 p \ W ll 44 ~

TABLE A Summary of the Shutdown Outside the Control Room due to Fire and/or Smoke (PVNGS Procedure No. 41AO-1ZZ44)

Cooldown Depressurization Duration Tem erature Pressure Rate Rate ~hr.

565'F( ) to 300'F 2250 psia 60'F/hr(b) N/A 4.4 300'F( 2250 psia O'/hr N/A 55(d) 300 F 2250 psia to N/A 0.7 psi/sec( ) 0.7 450 psia 300'F to 210'F 450 psia 100'F/hr(f) N/A 0.9 Total 61 hours 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) 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).

(e) 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.

4 ~

/ ~

i