ML17305B608
| ML17305B608 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/14/1991 |
| From: | Zimmerman R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| NUDOCS 9106260022 | |
| Download: ML17305B608 (6) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMIVIISSION REGION V 1450 MARIALANE,SUITE 210 WALNUTCREEK, CALIFORNIA94596 Docket No. 50-528 Arizona Public Service Company P. 0.
Box 53999
- Phoenix, Arizona 85072-3999 Attn:
Nr. William F.
Conway Executive Vice President, Nuclear Gentlemen:
P
Subject:
Temporary Waiver of Compliance Regarding Palo Verde Unit 1
Technical Specification Requirement 3.6.2.2.b In your letters dated June 13, 1991 and June 14,
- 1991, and in discussions with the NRC staff on June 13, 1991 and June 14,
- 1991, you requested temporary relief from Technical Specifications (TS) Action Statement 3.6.2.2.b regarding the length of time to restore one of two spray chemical addition pumps of the Iodine Removal
( IR) system to operable status,,'ou identified that the "B" train spray chemical addition pump did not meet the flow rate requirements of Technical Specification surveillance requirement 4.6.2.2.c during performance testing.
TS 3.6.2.2 al,lows only:..72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to restore the pump to operable status.
You concluded that extending the allowed out-of-service time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> by an additional 7 days when operating at 100% power involves no significant reduction in safety and that no new accidents were introduced for the following reasons:
You have completed an analysis, based on Standard Review Plan (SRP) 6.5.2, RevisiorI 2, which demonstrates that the IR system is not required to mitigate the envir'onmental or radiological consequences of a large break Loss of Coolant Accident (LBLOCA).
Removal of the IR system has no significant impact on the radiological consequences of a LBLOCA.
The current method for long-term containment sump pH control (Trisodium Phosphate in baskets) remains acceptable.
Removal of the IR system has no significant impact on the post-LOCA containment environment and its effects on post-LOCA hydrogen generation and equipment qualification.
Based on our review of your June 13, 1991 submittal and discussions with your
- staff, a verbal temporary waiver of compliance for the subject TS action statement only was granted, with NRR concurrence, on June 13, 1991 until 4:00 p.m.
YIST June 14, 1991.
9106260022 910614 PDri eDOCI; 0.=-0C>O~2."-.
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On June 14, 1991 you submitted a revised waiver request and pertinent portions of the above noted analysis.
Based on review of those documents, and discussions with NRR, a temporary waiver of compliance for the subject TS action.-.statement only is granted from 1:40 am NST, June 14, 1991 to expire at 1:40 am NST, June 21, 1991.
This temporary waiver extends the allowable time for the "8" train spray chemical addition pump of the iodine removal system to be inoperable by seven days;
- however, we request that you 'promptly inform us of any other changes to or planned activity on any portion of your containment spray or iodine removal system that has an effect. on the ability of these systems to perform their intended functions.
All other TS requirements remain in effect.
It is our understanding that you intend to submit by July 15, 1991 a
TS change request for removal of the IR system.
If our understanding concerning your actions is not correct, you should promptly notify this office.
Sincerely, R~
R.
P mmerman, Director Divi 'on of Reactor Safety and Projects CC:
J. Martin, RY T. tlurley, NRR"'.
- Taylor, EDO J.
Lieberman, OE J. Partlow, NRR B. Boger, NRR Yi. Virgilio, HRR J. Dyer, NRR C. Trammell, NRR A. Nendiola, NRR C. Thompson, NRR J. Caldwell, OEDO D. Coe, SRI PV
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