ML17305B052
| ML17305B052 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/18/1990 |
| From: | Peterson S Office of Nuclear Reactor Regulation |
| To: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| GL-88-14, TAC-71694, TAC-71695, TAC-71696, NUDOCS 9009240080 | |
| Download: ML17305B052 (6) | |
Text
Docket'Nos.
50-528, 50-529 and 50-530 Hr. William F.
Conway Arizona Public Service Company P. 0.
Box 53999 Phoenix, Arizona 85072-3999
Dear Hr. Conway:
September 18 90
SUBJECT:
GENERIC LETTER 88-14, "INSTRUMENT AIR SUPPLY SYSTEM PROBLEMS AFFECTING SAFETY-RELATED E(UIPHENT," RE(VEST FOR ADDITIONAL INFORMATION - PALO VERDE NUCLEAR GENERATING STATION UNITS 1, 2
AND 3 (TAC NOS. 71694,
- 71695, AND 71696)
On August 8, 1988, Generic Letter (GL) 88-14 was issued to all holders of operating licenses for nuclear power reactors.
It requested a review of NUREG-1275, Volume 2, a design/operations verification of the instrument air
- system, and a program description for maintaining air quality.
By letters dated February 20 and April 27, 1989, you responded to the generic letter.
In addition, you submitted a compressed gas report by letter of October 16,
- 1989, and responded to an NRC staff request for additional information in a further letter dated April 6, 1990.
In reviewing these submittals, we have determined that the additional information identified in the enclosure is needed to complete our review.
In order to maintain our review schedule, your response is requested within 60 days of your receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under Pub. L.96-511.
Please contact us if you should have any questions regarding this matter.
Sincerely, Original Signed By:
Sheri R. Peterson, Project Manager Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects
Enclosure:
Request for Additional Information cc w/enclosure:
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Mr. William F.
Conway Arizona Public Service Company Palo Verde CC Arthur C. Gehr, Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Charles R. Kocher, Esq. Assistant Counci 1 James A. Boeletto, Esq.
Southern California Edison Company P. 0.
Box 800
- Rosemead, California 91770 Senior Resident Inspector U.S. Nuclear Regulatory Commission HC-03 Box 293-NR Buckeye, Arizona 85326 Regional Administrator, Region V
U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mr. Charles B. Brinkman Washington Nuclear Operations Combustion Engineering, Inc.
12300 Twinbrook Parkway, Suite 330 Rockvi lie, Maryland 20852 Mr. Charles Tedford, Director Arizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, Arizona 85040 Chairman Maricopa County Board of Supervisors 111 South Third Avenue Phoenix, Arizona 85003 Mr. Jack R.
Newman Newman 5 Holtzinger P.C.
1615 L Street, NW, Suite 1000 Washington, DC 20036
P
RE VEST FOR ADDITIONAL INFORMATION PALO VERDE NUCLEAR GENERATING STATION ENCLOSURE INSTRUMENT AIR SUPPLY SYSTEMS GENERIC LETTER 88-14 Your initial letter of February 20, 1989, disclosed that the measured dew point at Unit 2 was greater than the design value and that compensatory measures had been put in place to prevent moisture accumulation.
You also stated that because all three units are of standard
- design, the test results are expected to be similar.
This would lead to the conclusion that moisture may also be a problem on Units I and 3 as well.
Indeed, the compressed gas report states (page
- 55) that "...a number of observations of excessive moisture in the compressed gas lines have been documented at all three units."
Additional problems with moisture are documented in NRC Inspection Report 90-03 issued on April 13, 1990.
With this as background, we would have expected some discussion in your supplemental letter of April 27, 1989, about the moisture problem reported on Unit 2 on February 20,
- 1989, and how it was resolved.
It also raises questions about the, other units, which, because of their similarity, would be expected to have the same problem.
Accordingly, you are requested to provide this information, including any available test results on moisture for Units I and 3.
Your letter of April 27, 1989, stated that additional tests (for moisture) would be conducted during your most humid months to verify that dew points can be maintained within the design value.
You are requested to provide the results of these additional tests.
Your letter of April 27, 1989, also stated that the complete review for the adequacy of the existing design basis and development of the Design Basis Manual for instrument air would be.completed during the first quarter of 1990.
You are requested to provide the verification requested in GL 88-14 that this activity has been completed.
As stated in the generic letter, when all requirements of the letter have been implemented, a written notification should be provided that all actions are complete.
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