ML17194A427
| ML17194A427 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 01/22/1982 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Delgeorge L COMMONWEALTH EDISON CO. |
| References | |
| TASK-04-03, TASK-4-3, TASK-RR IEB-80-07, IEB-80-7, LSO5-82-01-056, LSO5-82-1-56, NUDOCS 8201260243 | |
| Download: ML17194A427 (5) | |
Text
Docket No. 50-237 LS05-8~ 056 Mr. L. DelGeorge Director of Nuclear Licensing Co1TH110nwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear.Mr; D~lGeorge:
\\. ~.:."
January 22, 1982
SUBJECT:
SEP TOPIC IV-3, QWR JET PUMP OPERATING INDICATIONS DRESDEN 2 Enclosed is a-copy of our final evaluation of SEP Topfc IV-3, "BWR Jet Pump Operating Indications" for Dresden Unit 2. Thfs evaluation super-sedes that previously sent by- letter dated August 17, 1978.
The evalua-tion concludes that Dresden 2 meets current criteria based on compliance with IE Bulletin 80-07.
Thi~ evaluation will be a basic input to the integrated safety assessment for your facility unless yot.i identify changes needed to reflect the as-.
built conditions at your facility. This assessment may be revised in the future if your facility design is changed or if NRC criteria relating to thf s subject are modified before the integrated assessment is completed
- Sincerely, '
. I.
Enclosure:
As stated cc w/enclosure:
Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 Dfvfsion of Licensing I
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NRC FORM 318 (10-80) NRCM 0240 0 FF I c I AL RE c 0 R 0 c 0 PY USGPO: 1981-335-960-"'
-~
Docket No. 50-237
- . LS05-82 056.
- Mr. L.
DelGeo~ge Director of Nuclear Licensing Commonwealth Edi.son Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Del George:
SUBJECT:
SEP TOPIC IV-3, BWR JET PUMP OPERATING INDICATIONS DRESDEN.2*
Enclos-ed. i$. a copy of our final* evaluation of SEP Topic IV.. 3, 11 BWR Jet.
Pump Opera.ting Indkattons for Dresden Unit 2.
This evaluation* super....
sedes that pfeviously sent*by letter dated August 17, 1978.
The evalua~
- ti'on concludes that Dresden 2 meets current criter~ia based o~ co!JlPliance with I'E Bullettn 80-07.
. This evaiuatton will be a basic input to the* integ~ate'd saf~ty assesSffi;nt for your facility unless you identify changes needed to reflect the *as.....
built conditions at your facility.
This assessment may be revised in the future if yaur facility design is changed or* if NRC criteria* relating to this subject are modHied before the integrated asse~ment is* completed, Enclosu.re:.
As stated G.~. w/encl osure:
See next page Sincerely, L7Jl./LJ-~1:U Dennis M. Crutchfield, ~
- ~ Operating Reactors Branch No. 5 Division of Licensing
Mr. L ** DelGeo~ge
. cc Isham, Lincoln & Seale Counselors at Law One First ~ational Plaia, 42nd Floor Chic.ago, Illinois 60603 Mr. B. B. Stephenson.
Plant Super~ntendent *.
Dresden.Nuclear Power Station Ru ra 1 Route #1 Morr~s, Illinois 60450 Natural Resources Defense Council 917 15th Street, N. W.
Washington, D. C.
20005 U. S. Nuclear Regulatory Commission
- Resident Inspectors Office Dresden Station*:
RR #1 Morris, Illinois 60450 Mary Jo Murray Assistant Attorney General Environmental.Control Di v-i sion 188 w~ Randolph Street Suite 2315
'Chicago, Illinois 60601
- Morri-s Public Library 604 Liberty Street Mo-rri's, Illinois 50'451 Chai rm~n Board of Supervisots of.
Grundy County *
- Grundy. County Courthouse..
Morris, I 11 i noi s.. 60450 John F. Wolf,. Esquire 3409 Shepherd Street C li'evy*-~ ha se, Maryl and
~0015 Dr. Linda W. Little 500 Hermitage Drive" Raleigh, North Carblina 27612
\\
Illinois Departiri"ent of Nuc:lear Safety 1035 Outer Park.Drive," 5th Floor,
~pringfield,.Illinois 62704
- u. s.. Environmental Protection Agency Fed~ral Activities Br~nch Region V Office ATTN:
Regional Radi atfon Representative 230 South Dearborn Street Chicago, Illinois 60604 Or. Forrest J. Remick :
305 East Hamil ton Avenue State College, Pennsylvania 168_01
- The Honorable Tom Corcoran United States House of Representatives Washing:ton, D. C.
2051:5.
Robert H. Engel ken, Regi qn~l Adm.in.
- Nuclear Regulatory Commission*.
Region V t
~
Office of Inspection\\ Enforcement 1450 Mari a Lane
- Walnut Creek, Calif~rn'a
~4596 j
~*..
SYSTEMATIC EVALUATION PROGRAM TOPI-C IV-'3 DRESDEN-2
- ~
. *TOPIC:*" IV-3, BWR JET PUMP OPERATING INDICATIONS I.
INTRODUCTION If a jet*pump BWR operates with a.degraded jet pump, it may become*
impo~sible to reflood the.core in the event of a LOCAi The ~afety "bbjectives of this topic are to assure that the core flow can be determined and assure the abi 1 ity to detect a jet pump failure for.
a range of crack/break sizes at various locations on the pump.
- II.
REVIEW CRITERIA The plant d~Sign was-~eviewed with regard to G~neral Design Criterion
- _j5 of-Appendi~ A to 10 CFR Part 50 as it relates to-the ECCS being***
designed to provide an abundance of core cooling to transfer heat*
- from-the core at~ rate so that fuel and clad damage will not inter-fere with.continued effective core cooling and with regard to General Design Criterion 13 as it relates to in~trumentation bein~ p..rdvided to monitor systems over their anticipated ranges for normal opera-tion,.anticjpated operational occurrences.and f<1r ~cide~t conditiorf'S.
III.
RELATED SAFETY TOPICS SEP Topi~ V-10. B, "Residual Heat Removal System Re( iabil ity" ensures reliable plant shutdown capability, Topic VII-3, 'Systems Required fc1r Safe Shutdown" assures the des i*gn adequacy of systems necess~ry to achieve and maintain a safe shutdown condition.
Various section
- XV topics re~iew the plant ~esponse ~ith respect to abnormal.and accident conditions.
IV.
REVIEW GUIDELINES The plant*.is reviewed* accordin!}.. to the guidance provided in Standard Review Plan (.SRP} 6,3, "Emergency Core Cooling Systems" and SRP 7.5, 111.nformation Systems Important to Safety."
V,.
EVALUATION
- --. By 1 etter dated ~eptember 19, 1975, the Commonw)~lth Edi son Company
- suomi*tted a tech'1,ical specifica_tion change request for the Dresden and Quad Cittes stations.
The purpose of the proposed change.was to eliminate license requirements for jet pump flow indication.
Acceptance of the change would have resulted in deletion*of established requirements for individual jet pump flow indicator checks.
The request raised a concern with the staff due to a* history of jet p~mp problems such as failures of retainer bblt keepers and related components.
In addition, Reactor *Ope rat i rig Experience Newsletter
- 13-3, issued March 30, 1973, *described three occasions where actual jet pump flow malfunttjons had been identified-by individual jet pump flow indicators.
This concern led to the development of Multiplant Action Item B-28, 11 BWR Jet Pump Flow Indication Elimina-tion" which addressed the adequacy of jet pump i"nstrumentation to monitor jet pump behavior.
The concerns of Action Item B-28 are identical to those of SEP Topic IV regarding the ability to detect jet pump failures.
In February 1980~ a jet pump holddown beam bar failed at 01'.'esden Unit 3 and resulted in jet pump displacement.
This event renewed interest in jet pump component integrity and assurance of jet pump*
operational integrity, As a result, the NRC issued IE Bulletin
- 80-07, "BWR Jet Pump Assembly Failure" on April 4,.1980, and a*
- supplement dated May 13, 1980.
The Bulletin raises a concern_that
. the holddown beam assemblies and a -subsequent. jet pump function may
- degrade significantly during operation and could lead to jet pump disassembly and possibly reduce the margin of safety duriAg )Cii6tulated accidents. Therefore, licensees of GE designed BWR-3 and~BWR-4 facilities with operating licenses were require~ t~take5acttons. *
~
which would assure that adequate surveillance of jet pump operability is maintatned~
Commom<1ealth Edison Company responded to IE Bulletin 80-07 by letters dated April 23, 1980 and May 9, 1980.
These lette~s indicated the l"kensee's agreement to implement a modified jet pump surveillance program at Dresden Units 2 and 3 and Quad Cities Units 1 and 2. ~-
The. specifi c~monitoring requirements of IE Bulletin 80-07 go beyonc:I those which were under consideration in Multi-plant Action Item B-28.
'1"herefore, the staff considers item B-28 as complete.
IV.. CONCLUSION Bas~d on the above considerations, we conclude that the licensee's modifi"ed jet pump surveillance program is* suffiCient to detect jet pump failure.
Therefore; we consider Topic IV-3 to be complete.
..