ML042460306
| ML042460306 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/01/2004 |
| From: | Fields M NRC/NRR/DLPM/LPD4 |
| To: | Overbeck G Arizona Public Service Co |
| Fields M , NRR/DLPM,415-3062 | |
| References | |
| TAC MB9596, TAC MB9597, TAC MB9598 | |
| Download: ML042460306 (5) | |
Text
September 1, 2004 Mr. Gregg R. Overbeck Senior Vice President, Nuclear 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 RE: BULLETIN 2003-01, POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED WATER REACTORS" (TAC NOS. MB9596, MB9597 AND MB9598)
Dear Mr. Overbeck:
By letter dated August 8, 2003, Arizona Public Service Company (APS or the licensee) provided its 60-day response to NRC Bulletin 2003-01 for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3. The Bulletin requested licensees either (1) state that the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation functions have been analyzed with respect to the potentially adverse post-accident debris blockage effects identified in the Bulletin and are in compliance with all existing applicable regulatory requirements, or (2) describe any interim compensatory measures that have been implemented or that will be implemented to reduce the interim risk associated with potentially degraded or nonconforming ECCS and CSS recirculation functions until an evaluation to determine compliance is complete.
The staff has determined that additional information is needed in order to complete its review and evaluation of your August 8 response to Bulletin 2003-01. The enclosed questions were e-mailed to your staff on August 25, 2004. Any differences between the enclosed request for additional information and the questions that were e-mailed are editorial or clarifications. Your staff agreed to submit a response to these questions within 60 days of the date of this letter.
Sincerely,
/RA/
Mel B. Fields, Senior Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. STN 50-528, STN 50-529, and STN 50-530
Enclosure:
Request for Additional Information - Bulletin 2003-01 cc w/encl:
See next page
September 1, 2004 Mr. Gregg R. Overbeck Senior Vice President, Nuclear 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 RE: BULLETIN 2003-01, POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED WATER REACTORS" (TAC NOS. MB9596, MB9597 AND MB9598)
Dear Mr. Overbeck:
By letter dated August 8, 2003, Arizona Public Service Company (APS or the licensee) provided its 60-day response to NRC Bulletin 2003-01 for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3. The Bulletin requested licensees either (1) state that the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation functions have been analyzed with respect to the potentially adverse post-accident debris blockage effects identified in the Bulletin and are in compliance with all existing applicable regulatory requirements, or (2) describe any interim compensatory measures that have been implemented or that will be implemented to reduce the interim risk associated with potentially degraded or nonconforming ECCS and CSS recirculation functions until an evaluation to determine compliance is complete.
The staff has determined that additional information is needed in order to complete its review and evaluation of your August 8 response to Bulletin 2003-01. The enclosed questions were e-mailed to your staff on August 25, 2004. Any differences between the enclosed request for additional information and the questions that were e-mailed are editorial or clarifications. Your staff agreed to submit a response to these questions within 60 days of the date of this letter.
Sincerely,
/RA/
Mel B. Fields, Senior Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. STN 50-528, STN 50-529, and STN 50-530
Enclosure:
Request for Additional Information - Bulletin 2003-01 cc w/encl:
See next page DISTRIBUTION PUBLIC PDIV-2 r/f RidsNrrPMMFields RidsNrrLADBaxley RidsRgn4MailCenter (TPruett)
- Per T. Marsh deferral memo ACCESSION NO: ML042460306 NRR-088 OFFICE PDIV-2/PM PDIV-1/LA*
PDIV-2/SC NAME MFields DBaxley SDembek DATE 8-30-04 NA 9/1/04 OFFICIAL RECORD COPY
REQUEST FOR ADDITIONAL INFORMATION BULLETIN 2003-01, "POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED WATER REACTORS" ARIZONA PUBLIC SERVICE COMPANY 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 August 8, 2003, Arizona Public Service Company (APS or the licensee) provided its 60-day response to NRC Bulletin 2003-01 for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3. The Bulletin requested licensees either (1) state that the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation functions have been analyzed with respect to the potentially adverse post-accident debris blockage effects identified in the Bulletin and are in compliance with all existing applicable regulatory requirements, or (2) describe any interim compensatory measures that have been implemented or that will be implemented to reduce the interim risk associated with potentially degraded or nonconforming ECCS and CSS recirculation functions until an evaluation to determine compliance is complete.
The staff has completed its review of the August 8 response and has determined it needs the following additional information to complete our review:
1.
Section 2.3 of the August 8 response states that [APS] Engineering will identify plant changes needed to address the potential for debris accumulation on the pump bay personnel access doors. This action will be completed by November 30, 2003, with any plant changes to be implemented prior to startup following the subsequent refueling outages in each unit... Please describe in detail the plant changes which were identified, the basis or bases for implementing the plant changes, the schedule for and completion status of the changes, any changes to any operating or maintenance procedures, and associated operator training.
2.
Sections 3.1, 3.2, 3.3, 3.4 and 3.5 of the August 8 response states that APS plans to defer the following training/changes until the Westinghouse Owners Group (WOG) addresses the issues and related revisions to the EPGs in CEN-152 are effected:
- a. Operator and staff training on indications of and responses to sump clogging.
- b. Procedure actions that delay the switchover to containment sump recirculation.
- c. Procedure actions that delay refueling water tank (RWT) inventory depletion.
- d. Procedure changes that provide for alternate water sources to refill the RWT.
- e. Procedure changes that provide for alternate sources to inject water into the reactor coolant system.
The WOG has now developed operational guidance in response to Bulletin 2003-01 for Westinghouse and CE plants. Please provide a discussion of your plans to consider implementing this new WOG guidance. Include a discussion of the WOG compensatory measures that have been or will be implemented for your plants. Provide technical justification for those WOG recommended compensatory measures not being implemented at your plants. Also include a detailed discussion of the procedures being modified, the operator training being implemented, and your schedule for implementing these compensatory measures.
3.
NRC Bulletin 2003-01 provides possible interim compensatory measures licensees could consider to reduce risks associated with sump clogging. In addition to those compensatory measures listed in Bulletin 2003-01, licensees may also consider implementing unique or plant-specific compensatory measures, as applicable. Please discuss any possible or unique plant-specific compensatory measures you considered for implementation at your plant. Include a basis for rejecting any of these additional considered measures.
Palo Verde Generating Station, Units 1, 2, and 3 cc:
Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street Phoenix, AZ 85007 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. M. Dwayne Carnes, Director Regulatory Affairs/Nuclear Assurance Palo Verde Nuclear Generating Station 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 Ms. Cheryl Adams Southern California Edison Company 5000 Pacific Coast Hwy Bldg DIN 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 Brian Almon Public Utility Commission William B. Travis Building P. O. Box 13326 1701 North Congress Avenue Austin, TX 78701-3326