ML17297B530
| ML17297B530 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/10/1982 |
| From: | Miraglia F Office of Nuclear Reactor Regulation |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| NUDOCS 8205190403 | |
| Download: ML17297B530 (7) | |
Text
MAY 1 0 1982 Docket Nos.:
50-528/529/530 Mr. E. E.'an Brunt, Jr.
Vice President - Nuclear Projects Arizona Public Service Company Post Office Box 21666 Phoenix, Arizona 85036
Dear Mr. Van Brunt:
O'EMI/CO
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Subject:
Request for Addition'al Information - Palo Verde Nuclear Generating Station In order to complete our review of Palo Verde, we find that we will need your response to the enclosed request for information.
These issues have been previously discussed w'ith Hr.'uinn of your staff.
Me request that, within one we'ek of receipt of this letter, you advis us to when you will provide the r'espon'ses to the'nclosure.
If you have any questions on 'this matter, please contact us.
Sincerely, Si~8 Frank J. Hiraglia, Chief Licensing Branch. No.
3 Division of Licensing
Enclosure:
Request for Additional Information iragli a cc:
See next page.
DISTRIBUTION:
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Van Brunt, Jr.
Vice President - Nuclear Projects Arizona Public Service Company P. 0.
Box 21666 Phoenix, Arizona 85036 PALO VERDE CC:
Arthur C. Gehr, Esq.
Snell 8 Wilmer 3100 Valley Center
- Phoenix, Arizona 85073 Charles S. Pierson Assistant Attorney General 200 State Capitol 1700 'lest ".ashington Phoenix, Arizona 85007 Charles R. Kocher, Esq.,
Assistan't Counsel James A. Beoletto, Esq.
Southern California Edison Company P. 0.
Box 800
- Rosemead, California g1770 Margaret 1'alker Deputy Director of Energy Programs Economic Planning and Development Office 1700 ~'est h'ashington Phoenix, Arizona 85007 Mr. Rand L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, l,'ew Mexico 87503 Resident Inspector Palo Verde/NPS U.S. Nuclear Regulatory Commission P. 0.
Box 21324 Phoenix, Arizona 85001 Ms. Patricia Lee Hourihan 6413 S. 26th Street
- Phoenix, Arizona 85040
ENCLOSURE
+C REQUEST FOR ADDITIONAL INFORNTION PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2 AND 3 The following requests for additional information concern Enclosure 2 to the applicant's March 25, 1982 letter which provides a discussion of the safe shutdown capability for the plant given a loss of the essential spray pond (UHS) spray nozzles due to tornado generated missiles.
- l. It is not clear from the discussion provided that the assessment for achieving safe reactor shutdown with a total loss of the essential spray pond nozzles includes a postulated single failure concurrent with the tornado missile damage.
The applicant should verify that the analysis assumes the above condition.
2.
As previously mentioned in discussions with the applicant, loss of off-site power is assumed concurrent with the tornado.
Therefore, the applicant should describe zhe capability of the essential spray ponds to cool the station emergency diesel generators and essential reactor auxiliaries (essential HVAC room coolers, reactor coolant pump seals, spent fuel pool, etc.) without the spray nozzles.
3.
The alternative shutdown capability described by the applicant involves the use of the auxiliary feedwater (AFM) system and atmospheric dump valves for long term cooling.
The discussion (and Table 1 of Enclosure 2) involves an evaluation of a number of alternate water sources for extended use of the AFM system.
Me require the following additional information on the water sources.
a.
Other than the condensate storage
- tank, none of the sources iden-tified appears to be tornado missile protected.
Justify the avail-ability of the alternative AFM sources (either by separation or inherent protection by location in suitable structures).
b.
Describe the time available to accomplish each of the temporary makeup water alignments for extended AFM supply.
This discussion should include an evaluation of manpower availability, and availability of necessary equipment.
c.
Verify that extended reactor cooling using alternate AFM sources does not result in degradation of the steam generators due to improper secondary side water chemistry.
4.
Provide an assessment of the time and equipment required to repair the spray nozzles/risers and thus restore portions of the spray pond following tornado missile damage.
5.
Commit to provide the necessary procedur es for establishing alternate AFW supply in the event of tornado missile damage to the UHS.
- Also, commit to provide procedures for repairing UHS tornado missile damage.
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The applicant has responded in their letters dated February 2, 1982 and February 26, 1982, to the concern identified in Section 6.2.6 of the Palo Verde SER (NUREG-0857) regarding the local leak rate test.
In the submit-tals, the applicant continued to propose testing of certain valves using water in lieu of air or nitrogen.
Although, water testing of certain valves for leakage is permissible under Appendix J requirements, the app1icant is required to perform an analysis to justify that the affected valves will re-main water covered following onset of a LOCA.
In the applicant's
- analysis, the following information must be provided:
1)
Source of sealing water for each of the affected valves; 2)
Minimum water inventory available assuming a single active failure in the associated system; and 3)
Proposed technical specification limits for the water test to ensure that the affected valves will remain water covered up to 30 days fol-lowing onset of a LOCA under a pressure of 1.1 Pa.
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