ML060760077
| ML060760077 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/21/2006 |
| From: | Fields M Plant Licensing Branch III-2 |
| To: | James M. Levine Arizona Public Service Co |
| Fields M , NRR/DORL,415-3062 | |
| References | |
| TAC MC9425, TAC MC9426, TAC MC9427 | |
| Download: ML060760077 (6) | |
Text
March 21, 2006 Mr. James M. Levine Executive Vice President, Generation Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 -
REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION AMENDMENT SUBMITTAL (TAC NOS. MC9425, MC9426, AND MC9427)
Dear Mr. Levine:
By letter dated December 23, 2005, Arizona Public Service Company submitted a license amendment request for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3. The request is to extend the allowed out of service time for one inoperable emergency diesel generator from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 10 days, add a clarifying note to Condition F of Technical Specification (TS) 3.8.1, "AC [alternating current] Sources - Operating," and revise TS 3.4.9, "Pressurizer," to delete the words which require that the two groups of pressurizer heaters be capable of being powered from an emergency power supply.
The Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and determined that additional information is required in order to complete the evaluation. The additional information being requested is enclosed. As discussed with Glenn Michael of your staff, the NRC staff is requesting a response within 60 days of the date of this letter.
If you have any questions, please contact me at 301-415-3062.
Sincerely,
/RA/
Mel B. Fields, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos: STN 50-528, 50-529 and STN 50-530
Enclosure:
Request for Additional Information cc w/encls: See next page
Mr. James M. Levine Executive Vice President, Generation Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 -
REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION AMENDMENT SUBMITTAL (TAC NOS. MC9425, MC9426, AND MC9427)
Dear Mr. Levine:
By letter dated December 23, 2005, Arizona Public Service Company submitted a license amendment request for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3. The request is to extend the allowed out of service time for one inoperable emergency diesel generator from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 10 days, add a clarifying note to Condition F of Technical Specification (TS) 3.8.1, "AC [alternating current] Sources - Operating," and revise TS 3.4.9, "Pressurizer," to delete the words which require that the two groups of pressurizer heaters be capable of being powered from an emergency power supply.
The Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and determined that additional information is required in order to complete the evaluation. The additional information being requested is enclosed. As discussed with Glenn Michael of your staff, the NRC staff is requesting a response within 60 days of the date of this letter.
If you have any questions, please contact me at 301-415-3062.
Sincerely,
/RA/
Mel B. Fields, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos: STN 50-528, 50-529 and STN 50-530
Enclosure:
Request for Additional Information DISTRIBUTION:
NONPUBLIC LPLIV Reading RidsNrrDorlDpr RidsNrrAdroDorlLplg RidsRgn4MailCenter (TPruett)
RidsAcrsAcnwMailCenter RidsNrrLADJohnson RidsNrrPMMFields RidsOgcRp ADAMS ACCESSION NO:
OFFICE LPL4/PM LPL4/LA LPL4/BC NAME MFields DJohnson DTerao DATE 3/20/06 3/20/06 3/21/06 OFFICIAL RECORD COPY
REQUEST FOR ADDITIONAL INFORMATION ARIZONA PUBLIC SERVICE COMPANY, ET. AL.
PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 DOCKET NOS. STN 50-528, STN 50-529, AND STN 50-530 By letter dated December 23, 2005, Arizona Public Service Company, submitted a license amendment request for the Palo Verde Nuclear Generating Station (PVNGS), Units 1, 2, and 3.
The request is to extend the allowed out of service (AOT) time for one inoperable emergency diesel generator (EDG) from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 10 days, add a clarifying note to Condition F of Technical Specification (TS) 3.8.1, "AC [alternating current] Sources - Operating," and revise TS 3.4.9, "Pressurizer," to delete the words which require that the two groups of pressurizer heaters be capable of being powered from an emergency power supply.
The staff has reviewed the information provided and determined that the following additional information is required in order to complete the evaluation.
1.
The staff finds that the compensatory measures listed on page 12 of Enclosure 2 are not comprehensive in nature. Please include the following compensatory measures in this list or provide justification for not including them:
a.
The operability of the gas turbine generators (GTGs) will be verified by test before entering the extended EDG AOT.
b.
The operability of the steam driven auxiliary feedwater pump will be verified before entering the extended EDG AOT.
c.
The system dispatcher will be contacted once per day and informed of the EDG status, along with the power needs of the facility.
d.
Should a severe weather warning be issued for the local area that could affect the switchyard or the offsite power supply during the AOT, an operator will be available locally at the GTG should local operation of the GTG be required as a result of on-site weather-related damage.
e.
No discretionary maintenance will be allowed on the main and unit auxiliary transformers associated with the unit.
2.
Are there any restrictions on the EDGs in the other two units when one EDG in one of the units is in extended AOT? Also, please confirm that no more than one EDG at the Palo Verde site will be in extended AOT at the same time.
3.
Please discuss what types of communication protocol has been established between the control room operator at Palo Verde and transmission system operator (TSO). Is the TSO notified in advance that an EDG is going to be taken out for an extended period of time?
4.
Does your TSO notify the plant operators when degraded grid conditions could occur and what action will be taken if degraded grid conditions occur during the EDG extended AOT?
5.
In Section 4.1 of Enclosure 2, Page 10, you have stated that The Gas Turbine (GT) system is comprised of two standby GTGs, either of which is capable of meeting the AC power requirements for any one of the three PVNGS units. Also, on Page 11, you have stated that Therefore, consistent with the defense-in-depth philosophy, the proposed change will continue to provide for multiple means to accomplish safety functions and prevent the release of radioactive material in the event of an accident. The staff understands that GTGs are rated at 3.4 mega watts (MW) and loss of offsite power with forced shutdown load is 5.19 MW (Unit 2 - EDG A) and loss of offsite power with loss of coolant accident load is 5.281 MW (Unit 1-EDG B) per the Final Safety Analysis Report Table 8.3-3 (Page 8.3-29). Please explain how one GTG is capable of meeting the AC power requirements for any one of the three PVNGS units.
6.
Please provide the current reliability and unavailability of the EDGs at PVNGS. Also, evaluate how these actual values relate to the target values committed for station blackout conditions.
Palo Verde Generating Station, Units 1, 2, and 3 cc:
March 2006 Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street Phoenix, AZ 85007 Mr. Douglas Kent Porter Senior Counsel Southern California Edison Company Law Department, Generation Resources P.O. Box 800 Rosemead, CA 91770 Senior Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 40 Buckeye, AZ 85326 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Chairman Maricopa County Board of Supervisors 301 W. Jefferson, 10th Floor Phoenix, AZ 85003 Mr. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, AZ 85040 Mr. Craig K. Seaman, General Manager Regulatory Affairs and Performance Improvement Palo Verde Nuclear Generating Station Mail Station 7636 P.O. Box 52034 Phoenix, AZ 85072-2034 Mr. Hector R. Puente Vice President, Power Generation El Paso Electric Company 310 E. Palm Lane, Suite 310 Phoenix, AZ 85004 Mr. John Taylor Public Service Company of New Mexico 2401 Aztec NE, MS Z110 Albuquerque, NM 87107-4224 Mr. Thomas D. Champ Southern California Edison Company 5000 Pacific Coast Hwy Bldg D1B San Clemente, CA 92672 Mr. Robert Henry Salt River Project 6504 East Thomas Road Scottsdale, AZ 85251 Mr. Jeffrey T. Weikert Assistant General Counsel El Paso Electric Company Mail Location 167 123 W. Mills El Paso, TX 79901 Mr. John Schumann Los Angeles Department of Water & Power Southern California Public Power Authority P.O. Box 51111, Room 1255-C Los Angeles, CA 90051-0100 Mr. Brian Almon Public Utility Commission William B. Travis Building P. O. Box 13326 1701 North Congress Avenue Austin, TX 78701-3326
Palo Verde Generating Station, Units 1, 2, and 3 cc:
March 2006 Ms. Karen O'Regan Environmental Program Manager City of Phoenix Office of Environmental Programs 200 West Washington Street Phoenix AZ 85003 Mr. Matthew Benac Assistant Vice President Nuclear & Generation Services El Paso Electric Company 340 East Palm Lane, Suite 310 Phoenix, AZ 85004