ML17297B664
| ML17297B664 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/10/1982 |
| From: | Van Brunt E, Vanbrunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0857, RTR-NUREG-857 ANPP-21803, NUDOCS 8209140343 | |
| Download: ML17297B664 (6) | |
Text
i~" - REGULATOR NFORMATION DISTRIBUTION TEM (RIDS)
ACCESSION NBR:8209140343 DOC,DATE: 82/09/10 NOTARIZED:
NO DOCKET 0
FACIL'STN 50 528 Palo Verde Nuclear Stations Unit ii Arizona Publi 05000528 STN 50-529 'Palo Verde Nuclear Station~
Unit 2p Arizona Publi 05000529 STN 50-530 Palo Verde Nuclear Station~
Uni't 3g Arizona Publi 05000530 AUTH,NAME AUTHOR AFFILIATION VANBRUNT~E.E.
Arizona Public Service Co, RECIP NAME RECIPIENT AFFILIATION NO YAKg'T, Division of Licensing
SUBJECT:
Provides supplemen,tary info -re accuracies 8 response time of post-accident containment instruments per SER Section 6,2 ~ 1 ~ 1,Sump water 8 atmosphere temp monitors~pressure monitors L water level instruments addressed, DISTRIBUTION 'CODE:
8001S
>COPIES RECEIVED:LTR
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SIZEo TITLE: Licensing 'Submi t ta 1:,PSAR/FSAR Amdts
& Related Corr espondence NOTES:Standardized plant ~
Standardized plant.
Standardized
- plant, 05000528 05000529 05000530 RECIPIENT ID CODE/NAME NRR/DL/ADL NRR LB3 LA INTERNAL: ELD/HDS3 IE/DEP EPDS 35 NRR/DE/AEAB NRR/DE/EQB 13 NRR/DE/HGEB 30 NRR/DE/MTEB 17 NRR/DE/SAB 24 NRR/DHFS/HFEB40 NRR/DHFS/OLB 34 NRR/DS I/AEB 26 NRR/DSI/CPB 10 NRR/DS I/ETSB 12 NRR/DSI/PSB 19 NRR SB 23 FILE 04
/DDAMI /MI8 EXTERNAL: ACRS 41-DMB/DSS (AMDTS)
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P.O. BOX 21666 PHOENIX, ARIZONA85036 September 10, 1982 ANPP-21803 10FQ/TFQ Mr. Thomas Novak Assistant Director for Licensing Division of Licensing Office..of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555
Subject:
Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3
Docket Nos.
STN-50-528/529/530 File:
82-056-026 G.1.01.10
Reference:
NUREG-0857, Safety Evaluation Report related to the operation of the Palo Verde Nuclear Generating Station
- Units, 1,
2 and 3, dated November, 1981
Dear Mr. Novak:
Section 6.2.1.1 of the referenced document discussed the unavailability of accuracies and response times of the following post-accident contain-....
ment instruments:
1.
Containment Sump Water Temperature.
Monitors 2.
Containment Atmosphere'emperature, Monitors 3.
Containment Pressure Monitors 4.
Containment Water Level Instruments This information has become available and is provided as follows:
1.
Containment Sump Water Temperature Monitors:
Temperature Element Time Constant is 5 seconds based on 3 fps (accident condition) water velocity for 63.2% of step change.
Time constant is approximately one minute at standstill (normal sump condition) and 63.2%
of step change.
Response
time of other components of the loop is negli-gible.
Loop accuracy at stabilized condition is + 4 F.
8209140343 820'710 PDR ADOCK 05000528 E
t
Thomas Novak September 10, 1982 ANPP-21803 - NFQ/YFQ Page 2
2.
Containment Atmosphere Temperature Monitors:
Temperature Element Time Constant is 8 seconds based on actual air velocity around thermocouple for 63.2% of step change.
Response
time of other components in the loop is 3 seconds.
Loop accuracy at stabilized conditions is + 5oF.
3.
Containment Pressure Monitors:
Response
time is 2.5 seconds.
Accuracy is + 3.5 psig.
4.
Containment Water Level Instrument:
Response
time is less than 0.5 seconds.
Accuracy is + 4 inches.
This closes out the subject confirmatory item.
Please contact me if any questions arise on this matter.
Very truly our E. E. Van Brunt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director EEVBJr/TFQ/sp cc:
A. C. Gehr,.:
L. Bernabei P. L. Hourihan E. Licitra J. Rosenthal
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