ML20045B643
| ML20045B643 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 06/10/1993 |
| From: | Jabbour K Office of Nuclear Reactor Regulation |
| To: | Hairston W GEORGIA POWER CO. |
| Shared Package | |
| ML20045B644 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, TAC-M51096, NUDOCS 9306180211 | |
| Download: ML20045B643 (5) | |
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NUCLEAR REGULATORY COMMISSION
- j WASHINGTON, D.C. 20555-0001 June 10,1993 Docket Nos. 50-321 and 50-366
-l Mr. W. G. Hairston, III Executive Vice President -
Nuclear Operations Georgia Power Company P. O. Box 1295 l
Birmingham, Alabama 35201 t
Dear Mr. Hairston:
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SUBJECT:
REGULATORY GUIDE 1.97, B0ILING WATER REACTOR NEUTRON FLUX MONITORING - EDWIN 1. HATCH NUCLEAR PLANT, UNITS 1 AND 2 (TAC Nos. M51096 AND M51097) i Section 6.2 of Generic Letter 82-33 requests applicants and licensees to provide a report on their implementation of Regulatory Guide (R.G.) 1.97, Revision 2, and methods for complying with the Commission's regulations including supporting technical justification of any proposed deviations or i
alternatives. A large number of deviation requests were received from Boiling Water Reactor (BWR) applicants and licensees concerning neutron flux' monitoring instrumentation. These requests were initially denied.
In support of these requests, the BWR Owners Group submitted NED0-31558,
" Position on NRC Regulatory Guide 1.97, Revision 3, Requirements for Post-Accident Neutron Monitoring System." NED0-31558 proposes alternate criteria for neutron flux monitoring instrumentation in lieu of the Category I criteria stated in R.G. 1.97.
The staff has completed its evaluation of NED0-31558, and by letter dated January 13, 1993, to the BWR Owners Group, issued a safety evaluation (enclosed). The safety evaluation concluded that, for current BWR operating license and construction permit holders, the criteria of NED0-31558 are acceptable. However, for new license applications for both conventional and advanced BWR designs, the R.G.1.97 criteria must be met for neutron flux monitoring instrumentation. The staff further concluded that Category I neutron flux monitoring instrumentation is not needed for existing BWRs to cope with a Loss-of-Coolant Accident, Anticipated Transient Without Scram, or other accidents that do not result in severe core damage conditions.
Instrumentation = to monitor the. progression of core melt accidents is best addressed by the current severe accident management program.
You are requested to review your neutron flux monitoring instrumentation against the criteria of NED0-31558 to determine whether you meet these criteria, and provide a letter to the-NRC documenting the results of your.
review.
If ycu do not meet th'e criteria, you should either make a commitment to meet the criteria and state when this commitment will be fulfilled, or
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W Mr. W. G. Hairston June 10,1993 explicitly state any deviations from the criteria and provide supporting justification.
The criteria of NED0-31558 include the use of uninterruptible and reliable power sources. The BWR Owners Group and the staff agree that redundant neutron flux monitoring channels should be powered from different uninterruptible power supplies (UPS), so that loss of a single UPS would not cause the loss of all channels. You are, therefore, requested to perform a plant-specific evaluation to review the power supplies to neutron flux monitoring instrumentation, including recorders. This review should verify that power would not be lost during design basis events by load shedding logics or similar schemes, and that a single power supply failure would not.
cause the loss of all channels. The results of this review should be indicated in your response to the staff concerning this issue.
i i
Since neutron flux monitoring instrumentation for BWRs is no longer considered l
to be Category 1 instrumentation, you may request the removal of neutron flux j
monitoring instrumentation from your post-accident monitoring Technical j
Specifications.
If you wish to maintain a post-accident monitoring Technical Specification on this instrumentation, you may do so.
l Please notify the NRC, within 60 days of receipt of this letter, of the 1
actions you plan to take and your schedule for implementation.
If you have any questions regarding this issue, please do not hesitate to contact me at i
(301) 504-1496.
This request for information was approved by the Office of Management and i
Budget under clearance number 3150-0011 which expires June 30, 1994.
Comments j
on burden and duplication may be directed to the Office of Management and
-l Budget, Reports Management Room 3208, New Executive Office Building, Washington, D. C. 20503.
'I I
Sincerely,/s/
Kahtan N. Jabbour, Project Manager Project Directorate 11-3 Division of Reactor Projects - 1/11-Office of Nuclear Reactor Regulation As stated cc w/ enclosure:
See next page DISTRIBUTION See next.page
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Mr. W. G. Hairston June 10, 1993 l
explicitly state any deviations from the criteria and provide supporting l
justification.
j The criteria of NED0-31558 include the use of uninterruptible and reliable power sources.
The BWR Owners Group and the staff agree that redundant neutron flux monitoring channels should be powered from different uninterruptible power supplies (UPS), so that loss of a single UPS would not i
cause the loss of all channels.
You are, therefore, requested to perform a plant-specific evaluation to review the power supplies to neutron flux i
monitoring instrumentation, including recorders. This review should verify l
that power would not be lost during design basis events by load shedding logics or similar schemes, and that a single power supply failure would not cause the loss of all channels.
The results of this review should be t
indicated in your response to the staff concerning this issue.
j i
Since neutron flux monitoring instrumentation for BWRs is no longer considered l
to be Category 1 instrumentation, you may request the removal of neutron flux i
monitoring instrumentation from your post-accident monitoring Technical _
Specifications.
If you wish to maintain a post-accident monitoring Technical l
Specification on this instrumentation, you may do so.
i Please notify the NRC, within 60 days of receipt of this letter, of the
)
actions you plan to take and your schedule for implementation.
If you have any questions regarding this issue, please do not hesitate to contact me at (301) 504-1496.
l This request for information was approved by the Office of Management and Budget under clearance number 3150-0011 which expires June 30, 1994. Comments on burden and duplication may be directed to the Office of Management and J
Budget, Reports Management Room 3208, New Executive Office Building, j
Washington, D. C. 20503.
J 4
Sincerely, j
f,7 btk. ^I Kahtan N. Jabbour, Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation i
Enclosure:
As stated cc w/ enclosure:
See next page
Mr. W. G. Hairston, III Georgia Power Company Edwin~I. Hatch Nuclear Plant cc:
i Mr. Ernest L. Blake, Jr.
Mr. Alan R. Herdt, Chief Shaw, Pittman, Potts and Trowbridge Project Branch #3 2300 N Street, NW.
U. S. Nuclear Regulatory Commission Washington, DC 20037 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
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Mr. J. T. Beckham Vice President - Plant Hatch Mr. Dan H. Smith, Vice President Georgia Power Company Power Supply Operations t
P. O. Box 1295 Oglethorpe Power Corporation
[
Birmingham, Alabama 35201 2100 East Exchange Place Tucker, Georgia 30085-1349 i
Mr. S. J. Bethay i
Manager Licensing - Hatch Charles A. Patrizia, Esquire l
Georgia Power Company Paul, Hastings Janofsky & Walker P. O. Box 1295 12th Floor Birmingham, Alabama 35201 1050 Connecticut Avenue, NW.
j Washington, DC 20036 i
Mr. L. Sumner General Manager, Nuclear Plant I
Georgia Power Company Route 1, Box 439 Baxley, Georgia 31513 l
Resident Inspector i
U.S. Nuclear Regulatory Commission i
Route 1, Box 725 Baxley, Georgia 31513 i
Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, NW. Suite 2900 Atlanta, Georgia 30323 Mr. Charles H. Badger Office of Planning and Budget Room 610 270 Washington Street, SW.
Atlanta, Georgia 30334 Harold Reheis, Director Department of Natural Resources f
205 Butler Street, SE., Suite 1252 Atlanta, Georgia 30334 Chairman Appling County Commissioners
[
County Courthouse Baxley, Georgia 31513 t
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