ML20005B888
| ML20005B888 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 09/09/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Linder F DAIRYLAND POWER COOPERATIVE |
| References | |
| TASK-08-04, TASK-8-4, TASK-RR LSO5-81-09-029, LSO5-81-9-29, NUDOCS 8109160077 | |
| Download: ML20005B888 (4) | |
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i September 9,1981 fWM/f Docket No. 50-409
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$9' WP g3 l 5 IO8t h. Z Mr. Frank Linder
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Dear Mr. Linder:
SUBJECT:
SEP TOPIC VIII-4. ELEt;TRICAL PENETRATIONS OF REACTOR CONTAINMENT, SAFETY EVALUATION REPORT FOR LA CROSSE The enclosed staff safety evaluation is based on a contractor document that has been made available to you previously. Thic evaluation is the staff's position regarding design of your facility in the subject area.
With regard to the referenced topic, the staff has concluded your facil-ity meets surrent licensing criteria.
Sincerely, Dennis !!. Crutchfield, Chief Oparating Reactors Branch No. 5 Division of Licensing Enclo.',ure:
As stated cc w/ enclosure:
See next page SbW
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OFFICIAL RECORD COPY PO.1981-335-960
Mr. Frank Linder cc Fritz Schubert, Esquire U. S. Environmental Protection Staff Attorney Agency Dairyland Power Cooperative Federal Activities Branch 2615 East Avenue South Region Y Office La Crosse, Wisconsin 54601 ATIN: EIS COORDINATOR
??0 South Dearborn Street O. S. Heistand, Jr., Esquire Chicago, Illinois 60604 Morgan, Lewis & Bockius 1800 M Street, N. W.
Mr. John H. Buck Washington, D. C.
20036 Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Comission Mr. R. E. Shimshak Washington, D. C.
20555 La Crosse Boiling Water Reactor Dairyland Pover Cooperative Dr. Lawrence R. Quarles P. O. Box 135 Kendal at Longwood, Apt. 51 Genoa, Wisconsin 54632 Kenneth Square, Pennsylvania 19348 Ms. Anne K. Morse Charles Bechhoefer, Esq., Chairman Coulee Region Energy Coalition Atomic Safety and Licensing Board P. O. Box 1583 U. S. Nuclear Regulatory Comission La Crosse, Wisconsin 54601 Washington, D. C.
20555 La Crosse Public Library Dr. George C. Anderson 800 Main Street Department of Oceanography La Crosse, Wisconsin 54601 University of Washington Seattle, Washington 98195 U. S. Nuclear Regulatory Comission Resident Inspectors Office Mr. Ralph S. Decker Rural Route #1, Box 276 Route 4, Box 190D Genoa, Wisconsin 54632 Cambridge, Maryland 21613 Town Chairman Thomas S. Moore Town of Genoa Atomic Safety and Licensing Appeal Board Roete 1 U. S. Nuclear Regulatory Comission Genoa, Wisconsin 54632 Washington, D. C.
20555 Chairman, Public Service Comission of Wisconsin Hill Farms State Office Building Madison, Wisconsin 53702 Alan S. Rosenthal, Esq., Chairman Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Comission Washington, D. C.
20555 Mr. Frederick Milton Olsen, III 609 North lith Street Lacrosse, Wisconsin 54601
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ENCLOSURE 1 SEP TOPIC VIII-4 T
EtECTRICAL PENETRATIONS OF REACTOR CONTAINMENT I.
INTRODUCTION The safety objective of Topic VIII-4, " Electrical Penctrations of Reactor Containment," is to assure that all electrical penetrations and the contain-ment structure are designed not to fail'from electrical faults during a high energy line break.
As part of the Systematic Evaluation Program (SEP) the NRC staff performed an audit, comparing sample containment electrical penetrations in SEP facilities with current licensing criteria for protection against fault and overload currents following a postulated accident.
II.
REVIEW LRITERIA The review criteria are presented in Section 2.0 of EG&G Report 0072J,
" Electrical Penetrations of the Reactor Containment."
In addition, in licensing new plants, the staff requires compliance with the recommendations of Regulatory Guide 1.63 or an accept ble alternative method.
For each conta,inment electrical penetratiers, the protective systems should (j
provide primary and backup circuit protection-devices to prevent a single failure in conjunction with a circuit overload from impairing containment integrity.
The crimary and backup protection devices nust have trip time vs. Current res;cnse characteristics which assure protection acainst
- ene raticn failure.
The prctecticn devices are to be periodically tested IC Verify trip set;cints and adequaC;. of respGnse.
Io single failure sncaid all:. excessive currerts in the penetration ccnductors that will cecrade Ine penetraticn seals.
Where_ external centrei pcuer is used for actuating the protection systems the pcwer for primary and backu; breakers should be derived from separate sources.
Overcurrent sicnals for tripping primary and tackup system devices should be electrically independent and physically separated.
III.
RELATED SAFETY TOPICS AND INTERFACCS The scope of review for this topic was limited to avoid duplication of effort since some aspects of the review were performed under the related The related topic report
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Topic III-12, Environmental Qualification.
cuntains the acceptance criteria and review guidance for.its subject matter.
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t Theoretically, there are no safety topics that are dependent on_ the present topic information for their completion, however the results of the present topic have a definite impact upon the capability of equip-ment inside of containment to function after a high energy line break.
IV.
REVIEW GUIDELINES The review guidelines are. presented in Section 3.0 of EG&G Report 0110J,
" Electrical Penetrations of the Reactor Containment."
V.
EVALUATION As noted in the EG&G Report on this topic with a LOCA environment inside containment, the protection for all penetrations conforms to the current licensing criteria.
VI.
CONCLUSIONS As a result of our review we have concluded that the penetrations conform to the current 1,icensing criteria.
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