ML20028H036
| ML20028H036 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/01/1990 |
| From: | Quay T Office of Nuclear Reactor Regulation |
| To: | Carns N ENTERGY OPERATIONS, INC. |
| References | |
| REF-GTECI-A-47, REF-GTECI-SY, TASK-A-47, TASK-OR GL-89-19, TAC-74907, NUDOCS 9010050266 | |
| Download: ML20028H036 (5) | |
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l October 1,1990 Docket No. 50-368 Entergy 0perations, Inc.
ATTN: Mr. Neil S. Carns Vice President, Operations Arkansas huclear One Post Office Box 551 Little Rock, Arkansas ???03
Dear Mr. Carns:
SUBJECT:
RESPONSE TO GENERIC LETTER 89-19. REGARDING SAFETY lllPLICATIONS OF l
CONTROLSYSTEllsINLWRNUCLEARPOWERPLANTS(TACNO74907)
By "1CAN039001, Responds to Generic Ltr 89-19 Re USI A-47, Safety Implications of Control Sys in LWR Nuclear Power Plants. Individual Plant Exam Approach Will Result in Best Safety Solution to [[generic letter" contains a listed "[" character as part of the property label and has therefore been classified as invalid. & Listed NUREGs|letter dated March 19, 1990]], Arkansas Power and Light Company responded to Generic Letter 89-19. " Request for Action Related to Resolution of Unresolved Safety Issue A-47, ' Safety Implications of Control Systems in LWR Nuclear Power plants' Pursuant to 10 CFR 50.54(f)."
In your letter, you stated that more l
detailed design studies and safety assessments must be completed before a decision can be made regarding implementation of a steam generator overfill protection system (SCOPS) at Arkansas Nuclear One, Unit 2 (ANO-2). This conclusion was based upon inherent plant-specific differences and the suggestion that implementation of SGOPS might increase the probability of loss of feedwater events due to inadvertent SGOPS actuation. Moreover, your letter stated that the appropriate framework to evaluate steam generator overfill events and the safety impact of implementing a si.eam theIndividualPlantExamination(IPE)generatoroverfillprotectionsystemis We do not agree with your position that a more detailed design and safety
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assessment using the IPE is an appropriate framework to continue the evaluation of steam generator overfill safety impacts.
Previous NRC analyses performed to evaluate alternatives to resolve USI A-47 provided insight with respect to the i
i safety benefits, impacts, and costs of modifications for the overfill protection.
Plant-specific differences were considered in the development of NUREG-1218,
- Regulatory Analysis for Resolution of USI A-47." and in the preparation of the Generic Letter 09-19. Ample opportunity was provided for coments on' this issue when the Federal Register notice was published in May 1989.
I Corbustion Engineering (CE) plants, as a class, do not provide steam generator overfill protection. Overfill events have occurred at CE plants and other LWRs. The consequences resulting from such events depend largely on piping system integrity, are difficult to model accurately, and have large uncertainties.
It is for these reasons that IPE evaluation will not add significant information to close this issue.
Further, we believe that the potential negative impacts of inadvertent isolation of feedwater can be made insignificant through sound de. sign, with reliable equipment, and with implementation of a reasonable test strategy.
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Mr. Neil S. Carns October 1,1990 In regard to the implementation schedule for ANO-2, the staff is of the opinion that implementation of the SGOPS prior to the startup following the t
Cycle 9 refueling outage is feasible. We request your response within 45 days from receipt of this letter regarding the implementation schedule.
i Sincerely, t
Ms N-c7 Theodore R. Quay, Acting Director Project Directorate IV.1 Division of Reactor Projects. 111 IV, Y and Special Projects Office of Nuclear Reactor Regulation 1
i cc: See next page I
DISTRIBUTION Docket File t
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M. Virgilio MS13E4 T. Quay l
L. Berry C. Poslusay l
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DATE 209/'t/90
- 09/11/90
- 09/#t/90
- 09/f/90
- 09/M'/90 I
JFFICIAL RECORD COPY Do'cument Name: AND RESPON5E TO GL 8919 74907 l
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f Mr. Neil S. Carns 2
t In regard to the implementation schedule for ANO-2, the staff is of the opinion that implementation of the SGOPS prior to the startup following the Cycle 9 refueling outage is feasible. We request your response within 45 days from receipt of this letter regarding the implementation schedule.
Sincerely, hgulew h-4-Aj.
Theodore R. Quay, Acting Director Project Directorate IV-1 Division of Reactor Projects - Ill, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc: See next page t
, Entergy Operations, Inc.
Arkansas Nuclear One, Unit 2 CC:
Mr. Early Ewing, General Manager Mr. Donald C. Hintz Technical Support and Assessment Executive Vice President Arkansas Nuclear One and Chief Operating Officer Route 3 Box 137G Entergy Operations, Inc.
Russellville, Arkansas 72801 P. O. Box 31995 Jackson, Mississippi 39286 Mr. Jerry Yelverton Mr. Gerald Muench Director Nuclear Operations Vice President Operations Support Arkansas Nuclear One Entergy Operations, Inc.
Route 3 Box 137G P. O. Box 31995 Russellville, Arkansas 72801 Jackson, Mississippi 39286 Mr. Nicholas S. Reynolds Mr. Robert B. McGehee, Esquire Bishop, Cook, Purcell & Reynolds Wise, Carter, Child & Caraway 1400 L Street, N.W.
P. O. Box 651 Washington, D.C.
20005-3502 Jackson, Mississippi 39205 Mr. Robert B. Borsum Mr. Charles B. Brinkman, Manager Babcock & Wilcox Washington Nuclear Operations Nuclear Power Generation Division Combustion Engineering, Inc.
1700 Rockville Pike, Suite 525 12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Rockville, Maryland 20852 Senior Resident Inspector U.S. Nuclear Regulatory Commission 1 Nuclear Plant Road Russellville, Arkansas 72801 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Office of Executive Director 1
for Operations 611 Ryan Plaza Drive, Suite 1000
' Arlington, Texas 76011 i
Honorable Joe W. Phillips County Judge of Pope County Pope County Courthouse l
Russellville, Arkansas 72801 l
Ms. Greta Dicus, Director Division of Environmental Health Protection Arkansas Department of Health 4815 West Markam Street Little Rock, Arkansas 72201 1
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