ML17298C040
| ML17298C040 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/12/1985 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| ANPP-32381-EEVB, NUDOCS 8504160396 | |
| Download: ML17298C040 (31) | |
Text
"REGULATOR
'NFORMATION DISTRIBUTION S "TEM (RIDS)
ACCESSION RIOR; 8504160396 DOC+ OATEN'5/04/12 NOTARIZEDe YES FACIE:STN"50-528 Palo Verde Nuclear Stationi Unit 1~ Arizona Publi STN-50-529 Palo Verde Nuclear Stationg Unit ?i Arizona Publi STN-50 530 Palo Verde Nuclear Station~
Unit 3i Arizona Publi AUTH'AME AUTHOR AFFILIATION VAN BRUNTiE.E, Arizona Public Service Co.
RECIP ~ NAME RECIPIENT AFFILIATION KNIGHTONg G e N ~
Licensing Branch 3
SUBJECT; Forwards'epsonse to NRC 850312 request for addi info re pressurizer safety valves.Info establishes acceptability of increased blowdown of pressurizer safety valves for power operation,
(
DISTRIBUTION CODE:
A001D COPIES RECEIVED:LTR ENCL'IZE~
TITLE:
OR Submittal:
General Distribution DOCKET 05000528 05000529 05000530 NOTES:Standardized
- plant, OL: 12/31/8' Standardized plant ~
Standardized plant ~
05000528 05000529 05000530 RE'C IP IENT ID CODE/NAME NRR LB3 BC 01 COPIES LTTR ENCL 7
7 RECIPIENT ID CODE/NAME COPIES LTTR ENCL
,INTERNAL: ACRS 09 ELD/HDS3 NRR/DL DIR NRR/DL/TSRG NRR/DSI/RAB RGN5 6
6 0
1 1
1 1
1 1
1 1
1 1
EXTERNAL: EGSG BRUSKEgS 1
NRC, PDR 02 LPDR NSIC 03 05 ADM/LFMB NRR/DE/MTEB NRR/DL/DRAB N
ETB G
F I'LE 0P 0
1 0,
1 TOTAL NUMBER OF COPIES REQUIRED:
LTTR
?7 ENCL 24
a 1
Arizona Nuclear Poorer Project P.o. BOX 52034 o
PHOENIX, ARIZONA85072-2034 Director of Nuclear Reactor Regulation Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555 ANPP-32381-EEVB/GEC Apri 1 12, 1985
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2, and 3
Pressurizer Safety Valves Docket Nos.
STN 50-528(License No. NPF-34)/529/530 File:
85-056-26'.1.01.10
References:
(1)
(2)
Letter from G.
W. Knighton, NRC, to E. E.
Van Brunt, Jr.,
- ANPP, dated December 18, 1984 (ANPP-31502);
Subject:
Post-FDA Proposed CESSAR Changes.
Letter from G.
W. Knighton, NRC, to E. E.
Van Brunt, Jr.,
- ANPP, dated"March 12, 1985;
Subject:
Request for Additional Lnformation-Palo Verde Safety Valves.
Dear Mr. Knighton:
License No. NPF-34 for PVNGS Unit 1 in Section 2.C(22) is conditioned as follows:
"Pressurizer Safet Valves Section 5.4 SSER 7
Prior to initial criticality, APS shall establish the acceptability of increased blowdown of the pressurizer safety valves for power operation."
The PVNGS Unit 1 license was conditioned as a result of the staff continuing its review of the safety significance of the safety valve increased blowdown on power operation as discussed in Reference 1.
The staff has since determined that additional information is required to complete the review.
This request for addi-tional information was transmitted to ANPP in Reference 2.
Attached, for the staff's review, are the responses to the request for information required to complete the review.
The submittal of this information also establishes the acceptability of the increased blowdown of the pressurizer safety valves for power operation as required by License Condition 2.C(22).
Please contact Mr. W. F. quinn of my staff if you have any questions on this matter.
sso4<60svi ss04 c Automatic 173000 Automatic Available Anal sis Value 3893 570 2370 2525 2475 2040.0 948 (56)
Manual Manual 107500 0.2 Most Positive Technical Specification Value Manual Unavailable
FiGuRE 1 COl'1PARISOH OF THE FI'LB WITH LOP AflD THE LOCV TRANSIENT REGARDINC PRESSURIZER LEVEL aSOO 1600 BOTTOM OF PSV NOZZLE 1741 FT (99.4X) 1400 o 1200
~ 1000 C/)
~
300 600 1193 FT 1206 FT FEED';.'ATER LIt!E BREAK +
LOP LOSS OF CO'lDEIISER VACUUN 400 10 20 30 TI.ME, SECO!lDS 40 50
FIGURE 2 COMPARISON OF THE PRESSURIZER LEVEL RES. ONSE OF THE FRL~ TRAflSIErlT l<ITH AND WITHOUT THE LOSS OF OFFSITE PQL ER 1800 BOTTOM OF PSV
>lOZZLE 1741 FT3 (99,4X) 1600 1400 1200
)
1000 800 FMLB + LOP 1206 FT 1194 FT F'ALB 600 400 10 20 30
- TIME, SECONDS 40 50
F I c) UR E 3 PRESSURIZER LEVEL RESPONSE FOR THE LIMITItfG Ft!LB TRAILSI EflT k I TH LOP 1800 BOTTON OF PSV NOZZLE.1741 FT3 (99,47) 1600 1400 1178 FT (6oK)
~1371 FT (79')
0 (ADJUSTED) m 1200 I
~ 1000 CA 800 FHLB +
LOP 600 400 10 20 30 TI."'.E, SECOffDS 40 50
FIGURE 0 RCS PRESSURE
RESPONSE
FOR THE LINITIllG FWLB TRANSIEflT 'L'iITH LO.
3100 2900 2700
~. 2500
~ 2300 2100 1900 1700 0
10 20 30
- TINE, SECONDS 40 50
,l
FIGURE 5 RCS SUBCOOL I HG HARG I)3 FOR THE LINITIflG FMLB TRAhSIEIlT 4'ITH LOP 60 50 30 20 10 10 20 30 Tlf"!E, SECOflDS LIO
FIGURE 6 MINIMUM DNBR RESPONSE FOR THE LIMITING FVLB TRAftSIEflT k'ITH LOP 4,0 3,0
~~2,0 1,0 MINIMUM DHBR =, 1.32 0,0 0
10 20 30 TIf'iE, SECO-".WADS 40 5G
HRC (}uestion 5
Provide the results of an evaluation with regard to the overall effects of all events analyzed in Chapter 15 of the FSAR.
Incorporate the changes made in Palo Verde plant on AFM, HPSI, Primary and Secondary Safety Valves.
Response
E The results of this evaluation are presented in the response to License Condition 2.C (21)
~
I[