ML20035E715
| ML20035E715 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/13/1993 |
| From: | James Shea Office of Nuclear Reactor Regulation |
| To: | Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| Shared Package | |
| ML20035E716 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, TAC-M51117, TAC-M51118, NUDOCS 9304190137 | |
| Download: ML20035E715 (3) | |
Text
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J' UNITED STATES o
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- E NUCLEAR REGULATORY COMMISSION 8
o WASHINGTON. D.C. 20555 April 13, 1993 g
Docket Nos. 50-277 l
and 50-278 Mr. George A Hunger, Jr..
]
Manager-Licensing, MC 52A-5 Philadelphia Electric Company l
l Nuclear Group Headquarters i
Correspondence Control Desk P.O. Box No. 195 Wayne, Pennsylvania 19087-0195 i
i l
Dear Mr. Hunger:
l I
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SUBJECT:
REGULATORY GUIDE 1.97 - BOILING WATER REACTOR NEUTRON FLUX i
l MONITORING, PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 l
(TAC N05. M51117 AND M51118)
Section 6.2 of Generic letter 82-33 requests applicants and licensees to provide a report on their implementation of Regulatory Guide (RG) 1.97,
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j Revision 2, and methods for complying with the Commission's regulations l
including supporting technical justification of any proposed deviations or l
l alternatives. A large number of deviation requests were received trom Boiling l
l Water Reactor (BWR) applicants and licensees concerning neutron flux 1
monitoring instrumentation. These requests were initially denied.
t 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 i
for neutron flux monitoring instrumentation in lieu of the Category 1 criteria l
l stated in RG 1.97.
i 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 i
(enclosed).
The safety evaluation concluded that, for current BWR operating l
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 RG 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 you do not meet the criteria, you should either make a commitment to meet the criteria and state when this commitment will be fulfilled, or gi explicitly state any deviations from the criteria and provide supporting gI justification.
j y
9304190137 930413 m C ^i W l
PDR ADOCK 05000277 I T ' " f, cRi ~ ^ " " g m e w :.Ad f P
PDR-
i Mr. George A. Hunger, Jr. April 13, 1993 i
J The criteria of NED0-31558 include the use of uninterruptible and reliable 1
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 l
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.
Although current Peach Bottom Technical Specifications (TS) do not include specific post-accident monitoring requirements for neutron flux j
instrumentation, you should note that neutron flux monitoring instrumentation for BWRs is no longer considered to be Category 1.
Thus, you need not include specific post-accident monitoring requirements for neutron flux monitoring i
instrumentation in the TS.
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 e
any questions regarding this issue, please do not hesitate to contact me at (301) 504-2426.
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 on burden and duplication may be directed to the Office of Management and Budget, Reports Management Room 3208, New Executive Office Building, Washington, D. C. 20503.
i
- Singely, Joseph W. Shea, Project Manager Project Directorate I-2 1
Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation
Enclosure:
l Safety Evaluation cc w/ enclosure:
See next page DISTRIBUTION i
Docket File JShea AHansen, 13E-21 NRC & Local PDRs M0'Brien BMarcus, 8H-3 l
PDI-2 Reading OGC SVarga ACRS(10)
JCalvo EWenzinger, RGN-I CMiller CAnderson. RON-I 0FFICE PDIdM PDI-2/fN PDIII-3/ LPM PDI-2/D MO,'Brh JSh6h AHansen M CM( H [r M NAME h/N93 If /M93
'l 4 2 /93 4/d/93 DATE 0FFICIAL RECORD COPY DOCUMENT NAME:
PB51117. GEN
Mr. George A. Hunger, Jr.
Peach Bottom Atomic Power Station, i
Philadelphia Electric Company Units 2 and 3 l
CC:
4 J. W. Durham, Sr., Esquire Mr. William P. Dornsife, Director Sr. V.P. & General Counsel Bureau of Radiation Protection i
Philadelphia Electric Company Pennsylvania Department of i
2301 Market Street, S26-1 Environmental Resources Philadelphia, Pennsylvania 19101 P. O. Box 2063 i
Harrisburg, Pennsylvania 17120 i
Philadelphia Electric Company ATTN: Mr. D. B. Miller, Vice President Board of Supervisors Peach Bottom Atomic Power Station Peach Bottom Township i
Route 1, Box 208 R. D. #1 Delta, Pennsylvania 17314 Delta, Pennsylvania 17314
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Philadelphia Electric Company Public Service Commission of Maryland ATTN:
Regulatory Engineer, Al-2S Engineering Division Peach Bottom Atomic Power Station ATTN:
Chief Engineer Route 1, Box 208 231 E. Baltimore Street Delta, Pennsylvania 17314 Baltimore, MD 21202-3486 t
Resident Inspector Mr. Richard McLean U.S. Nuclear Regulatory Commission Power Plant and Environmental Peach Bottom Atomic Power Station Review Division P.O. Box 399 Department of Natural Resources Delta, Pennsylvania 17314 B-3, Tawes States Office Building Annapolis, Maryland 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. Roland Fletcher Department of Environment 201 West Preston Street Baltimore, Maryland 21201 Carl D. Schaefer External Operations - Nuclear Delmarva Power & Light Company P.O. Box 231 Wilmington, DE 19899
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