ML17305B589
| ML17305B589 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/30/1991 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 102-02042-WFC-T, 102-2042-WFC-T, NUDOCS 9106100150 | |
| Download: ML17305B589 (6) | |
Text
ACCELERATED DISTRIBUTION DEMONSTPWTION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9106100150 DOC.DATE: 91/05/30 NOTARIZED: NO DOCKET I FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAME AUTHOR AFFILIATION CONWAY,W.F.
. Arizona Public Service Co.
(formerly Arizona Nuclear Power
)
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Responds to NRC ltr re violations noted in insp rept ept 50-529/89-03.Corrective actions:Routing condenser air removal vent to plant vent
& heat tracing lead shield assembly internal to radiation monitor.
DISTRIBUTION CODE:
IE01D COPIES RECEIVED:LTR 3 ENCL SIZE:
cP TITLE: General (50 Dkt)-Insp Rept/Notice of Violation Response NOTES:STANDARDIZED PLANT Standardized plant.
Standardized plant.
05000528 05000529 05000530 RECIPIENT ID CODE/NAME PD5 PD THOMPSON,M ERNAL: ACRS AEOD/DEIIB DEDRO NRR SHANKMAN,S NRR/DOEA/OEAB NRR/DRIS/DIR NRR/PMAS/ILRB12 OE D
RE EXTERNAL EG&G/BRYCEIJ ~ H ~
NSIC NOTES'OPIES LTTR ENCL RECIPIENT ID CODE/NAME TRAMMELL,C AEOD AEOD/TPAB NRR MORISSEAU,D NRR/DLPQ/LPEB10 NRR/DREP/PEPB9H NRR/DST/DIR 8E2 NUDOCS-ABSTRACT OGC/HDS1 RGN5 FILE 01 NRC PDR COPIES LTTR ENCL NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE iVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROiil DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 26 ENCL
Arizona Public Service Company P.O. BOX 53999
~
PHOENIX. ARIZONA85072.3999 WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 102-02042-WFC/TRB/JJN May 30, 1991 U.
S. Nuclear Regulatory Commission Attention:
Document Control Desk Hail Station:
Pl-37 Washington, DC 20555
Reference:
Letter to U., S. Nuclear Regulatory Commission from J.
N. Bailey, Vice President, Nuclear Safety and Licensing, Arizona Public
- Service, dated February 21, 1990
Dear Sirs:
Subj ect:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1, 2, and 3
Docket No.
STN 50-528 (License No. NPF-41)
Docket No.
STN 50-529 (License No. NPF-51)
Docket No.
STN 50-530 (License No. NPF-74)
Addendum to Reply to Notice of-Violation 50-529/89-03-01 File'1-070-026 This letter provides a status of the corrective actions for the condensate effluent monitor as discussed in the referenced letter and provides a new schedule for the completion of design changes to enhance the operability of the condensate effluent monitor.
Additional design enhancements are currently being evaluated as discussed below.
The condensate effluent monitors had experienced vapor condensation on the particulate/iodine sample media and gas detector during the winter season.
To preclude this condition, temporary modifications were completed in all three units.
These temporary modifications included heat tracing of the system piping up to the gas detector and removal of the gas chamber from the lead shield.
As a result, the monitors were not inoperable due to condensation during the recent winter season.
The temporary heat tracing modifications have been formalized into a permanent design changers In the referenced
- letter, the implementation of this permanent modification was discussed.
The due date was established based on the availability of parts and an outage of sufficient duration.
The permanent heat tracing modification.was completed in Unit 1 during the last surveillance outage and in Unit 3 during the 1991 refueling ouatge.
This modification is scheduled to be completed in Unit 2 during the scheduled refueling outage in 1991.
riowoor. o 9<o.=3o F,"IFi ADOCK O'-OCIO 2cI q
f'DR gpP
NRC Document Control Desk
'Page 2
102-02042-WFC/TRB/JJN May 30, 1991 In addition to the heat tracing, APS is evaluating modifications to further preclude the potential for vapor condensation in the monitors and the removal of the existing temporary modifications internal to the monitors.
The
'modifications being considered are:
1)
Mechanically separating the moisture in the effluent sample, 2)
Routing the condenser air removal vent to the plant vent, and/or 3)
Heat tracing the lead shield assembly internal to the radiation monitor.
This evaluation is expected to be completed by September 1991.
This evaluation will determine what additional modifications are required.
A schedule for implementation will be developed by November 1991.
Should you have any questions regarding this response, please contact me.
Very truly yours, WFC/TRB/JJN Attachments cc:
J.
B. Martin D. H.
Coe A. H. Gutterman A.
C.
Gehr
hi i
J