ML19318C119
| ML19318C119 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 06/23/1980 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Gasser R AFFILIATION NOT ASSIGNED |
| Shared Package | |
| ML19318C120 | List: |
| References | |
| NUDOCS 8006300691 | |
| Download: ML19318C119 (4) | |
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Docket No. 50-219 M 2 31980 Mr. Robert A. Gasser Freeholder Ocean County Courthouse Toms River, New Jersey 08753
Dear Mr. Gasser:
Congressman Hughes has forwarded your mailgram to the NRC with the request that we contact you directly to address the adequacy of the spray sparger repairs at Oyster Creek.
The NRC has reviewed the proposed repair to the core spray spargers and found it acceptable.
I am enclosing a copy of Amendment No. 47 to Provisional Operating License No. DPR-16 for the Oyster Creek facility which includes our safety evaluation supporting operation '
with the core spray sparger repair assemblies during the forthcoming reactor cycle.
TMs Amendment also requires the replacement of all the Oyster Creek cc e spray spargers during the 1981 refueling outage.
I hope this letter is responsive to your concern. Should you wish to discuss this matter further, please contact Mr. Walter Paulson, the Project Manager for the Oyster Creek facility on 301/492-9520.
Sincerely, Criginal Sigred by H. R. Dcn on Harold R. Denton, Director Office of Nuclear Reactor Regulation
Enclosure:
Amendment No. 47 to POL DPR-16 dated 5/15/80 cc w/ enclosure:
The Honorable William J. Hughes U. S. House of Representatives Washington, D. C.
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May 15,1980 Docket flo. 50-219 Mr. I. R. Finfrock, Jr.
Vice President - Generation Jersey Central Power & Light Company Madison Avenue at Punch Bowl Road Mc~ ~. town, New Jersey 07960
Dear Mr. Finfrock:
The Coranission has issued the enclosed Amendment No. 47 to Provisional Operating License No. DPR-16 for the Oyster Creek Nuclear Generating Station. This amendment is in response to your application dated March 31, 1980.
The amendment adds a new license condition (Paragraph 3.G) which re-quires the replacement of core spray spargers during the 1981 refuel-ing outage.
During our' review of your application, we found it to be more appropriate to incorporate a license condition rather than to modify Technical Specifi-cation 4.3 as you proposed.
We have discussed this change with your repre-sentative and have mutually agreed upon it.
Copies of our related Safety Evaluation and the Notice of Issuance are also enclosed.
Sin erely, Dennis M. Crutchfield, hief Operating Reactors Branch #5 Division of Licensing
Enclosures:
1.
Amendment No. 47 to License No. DPR-16 2.
Safety Evaluation 3.
Notice of Issuance cc w/ enclosures:
See next page i
- Mr! 1. R. Finf rock, Jr. May 15,1980 l:
r CC G. F. Trowbridge, Esquire Gene Fisher Shaw, Pittman, Potts and Trowbridge Bureau Chief
' Bureau of Radiation Protection 1800 M Street, N. W.
Washington, D. C.
20036 380 Scotts Road Trenton, New Jersey 08628 GPU Service Corporation J
ATTN: Mr. E. G. Wallace Mark L. First Licensing Manager Deputy Attorney General
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260 Cherry Nill Road State of New Jersey Parsippany, New Jersey 07054 Department of Law and Public Safety Environmental Protection Section 36 West State Street Anthony Z. Roisman Nat0ral Resources Defense Council Trenton, New Jersey 08625 J
91715th Street, N. W.
Washington, D. C.
20006 Joseph T. Carroll, Jr.
Plant Superintendent Oyster Creek Nuclear Generating Steven P. Russo, Esquire Station P. O. Box 388 248 Washington Street Forked River, New Jersey 08731 P. O. Box 1060 Toms River, New Jersey 08753 Joseph W. Ferraro, Jr., Esquire Director, Technical Assessment Deputy Attorney General Division Office of Radiation Programs State of New Jersey Department of Law and Public Sa~fety (AW-459) 1100 Raymond Boulevard U. S. Environmental Protection Newark, New Jersey 07012 Agency j
Crystal Mall #E Ocean County Library Arlin'gton, Virginia 20460 Brick Township Branch 401 Chambers Bridge Road U. S. Environmental Protection Brick Town, New Jersey 08723 Agency Region II Office ATTN:
EIS COORDINATOR Mayor 26 Federal Plaza Lacey Township New York, New York 10007 P. O. Box 475 Forked River, New Jersey 08731
- Comi ssioner Department of Public Utilities State of New Jersey 101 Comerce Street Newark, New Jersey 07102 fw/ incoming dtd March 31,1980)
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JERSEY CENTRAL POWER & LIGHT COMPANY _
DOCKET NO. 50-219 OYSTER CREEK NUCLEAR GENERATING STATION, UNIT NO.1 AMENDMENT TO PROVISIONAL OPERATING LICENSE Amendment No. 47 License No. DPR-16 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by Jersey Central Power & Light Company (the licensee) dated March 31, 1980, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Comission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Comnission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will te conducted in compliance with.the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and The issuance of this amendmeat is in accordance with 10 CFR Part 51 of the Comission's regulations and all applicable requirements have been satisfied.
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- 2. 'Accordingly, Provisional Operating License No. DPR-16 is hereby amended by adding paragraph 3.G to read as follows:
G.
The licensee shall replace all the core spray spargers during the 1981 refueling outage as described in the NRC's I
j staff Safety Evaluation dated May 15, 1980.
3.
This license amendment is effective as of the date of its issuance.
FOR THE NUCLEAR REGULATORY COMMISSION
.y Dennis M. Crutchfield, ief Operating Reactors Branch #5 Division of Licensing Date of Issuance: May 15,.1980 O
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 47 TO LICENSE NO. DPR-16 JERSEY CENTRAL POWER & LIGHT COMPANY OYSTER CREEK NUCLEAR GENERATING STATION DOCKET NO. 50-219
1.0 INTRODUCTION
By letter dated March 31, 1980, Jersey Central Power & Light Company requested a Technical specification change that would modify section 4.3 to provide for an augmented inservice inspection of the core spray spargers and repair assemblies beginning with the 1981 refueling outage.
Scheduled inservice inspection and subsequent tests of the reactor internals during the 1978 refueling outage at the Oyster Creek Nuclear Generating Station identified and confirmed the existence of a crack in a portion of one of the two core spray system spargers inside the reactor vessel.
Action was taken during the Fall 1978 outage to rtrengthen the sparger at the crack location by the instal -
lat' ion of a mechanical clamp assembly.
During the 1980 refueling outage, additional cracks werc' discovered by a signifi-cantly improved procedure for inservice inspection of th'e spargers.
(It is not known whether these are new cracks, or previously existing cracks that were over-looked during the 1978 inspection.)
The proposed repair was designed to return the core spray systeri to 'a fully' operational state capable of delivering the required core spray. The associated Technical Specification change would have required augmentation of the inspection requirements to assure continued system functional capability.
2.0 DISCUSSION The' 0yster Creek reactor vessel contains two indepen' dent core spray sparger assemblies which are fed by two separate core spray systems.
Each of these systems is provided with full redundant pumps, valves, power supplies, controls and instrumentation, so that either system can herform the safety function in the presence of a single f ailure in the other system.
Only one system is needed to accomplish the safety objective.. When the system is activated, core spray water is directed through the reactor vessel and shroud into the core spray sparger assemblies.
Each core spray sparger contains spray nozales that are designed to provide a spray p.attern that ensures each fuel bundle receives adequate coolant flow.
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segments, each of which is supported at the 0
Each sparger consists of two 180 f
centrally located inlet pipe connection that is welded to the shroud, and b~y three appror.imately equally spaced support brackets on either side of the centr The sparger arms, supported in the radial and vertical inlet pipe connection.
directions, arc free to slide circumferentially as required of cool core spray water.
Inservice inspections perforced during the Tall 1978 outage revealed crack in the upper sparger that was determined to be through-wall for ab 0 circumferentially.
135 Although analyses inoicated that the cracked spar both core spray systems would have full design capability.
Examination of the spargers during the 1980 refueling outage showed tha repair clacp assembly recained as installed in 1978.
of the spargers in January 1980 revealed a number of additional crack The proposed repair is the addition of seven clamp j
upper and lower spargers.asserblies to the upper sparger and two clamp as e
These clamp assemblies are the same in concept, material, and cross-se the repair clamp installed in 1978.
The requested Technical Specification change w future refueling outages, starting in 1981.
e EVALUATION-3.0 The analysis, design and installation of the repair bracket assemblies a The analyses of the eccordance with currently accepted engineering practices.
structural loads imposed by static, seismic and thermal loading demon bracket assembly's ability to limit the crack opening to within an accep i
ference.
. range should an existing crack propagate around the pipe c rcum Although the stresses from the normal operating loads in the core spray are v. ell below the yield stress of the stainless steel material, the does not show that those stresses are at or below the K teiow wnich a crack will not propagate by stress corrosion) for the mat an.ironment combination in question.
The analysis suggests that the relatively high residual stresses that r from forcing the pipe into position during installation together with some sensitization of the material due to welding, cold work, local heating etc bly cause the cracking observed, which is believed to be stress The analysis also suggests that, because the opening of could concefu?
the suscepttbility corrosion cracking.
to stress corrosion cracki.ng in those locations is reduced
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We concur with the licensee that high installation stresses, material sensitiza-ticr., cold work, local heating etc. are all probable causes for the initiation of stress corrosion cracking and we agree that crack opening could relieve stresses and therefore reduce the susceptibility of stress corrosion cracking in other locations.
However, there is insufficient basis to conclude that stress corrcsion crack initiation and propagation has been eliminated completely.
4.0
SUMMARY
We have evaluated the Repair Proposed No. 475-01, "0yster Creek Nuclear Generating Station Core Spray System Sparger Repair" and have met with the licensee and his contractors regarding this matter.
We conclude that the proposed interim repair of the Oyster Creek spargers is adequate for the present condition of the spargers and does not represent a significant
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change in safety margin from that of the original design, nor will the installation of the repair hardware increase the probability of an accident.
Thus, there is reasonable assurance that the health and safety of the general public will not be jeopardized by continued operation of the as-repaired facility for the next fuel' cycle.
Concern over significant amounts of additional cracking over the long term remain.
The licensee is proceeding with the design of replacement core spray spargers and has stated that they will be installed at the next refueling outage if the design is completed and the hardware can be procured.
We conclude that this effort should be accelerated and that the existing spargers should be replaced during the 1981 refueling outage.
We have discussed this requirement with the licensee's representative and he has agreed to this replacement schedule.
The licensee also agreed that the requested Technical Specification change for augmented inservice inspection of the core spray spargers and repair assemblies is no longer appropriate because the spargers will be replaced in 1981.
5.0 ENVIRONMENTAL CONSIDERATION
Me have determined that the amendment does~ hot authorize a change in effluent types or total amounts nor an increase in power level and will not result in any signific' ant envircnmental impact.
llaving made this deter.T.iration, we have further concluded that the anendment invo1~ves an action which is insignifican-from the stand-point of environmental ir. pact and,' pursuant to 10 CFP. 551.5(d)(4),
that an environmental impact statement or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
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6.0 CONCLUSION
We have concluded, based on the considerations discussed above,
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(1) because the amendment does not ir.volve a significant in-tha t:
crease in the probability or consequences of accidents previously.
considered and does not involve a sicnificant decrease in a' safety margin, the amendment does not involve a significant ha ards.considsr-ation, (2) there is reasonable assurance that the health and sa'ety of the public will not be endangered by operation in,the proposed manner, and (3) such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendmint will not be inimical to the common defense and security or to the health and safety of the public.
Date: May 15,1980 i
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7590-01 UNITED STATES NUCLEAR REGULATORY COMMISSION DOCKET NO. 50-219 JERSEY CENTRAL POWER & LIGHT COMPANY NOTICE OF ISSUANCE OF AMENDMENT TO PROVISIONAL OPERATING LICENSE The U. S. Nuclear Regulatory Commission (the Commission) has issued 1
Amendmen't No. 47 to Provisional Operating License No. DPR-16, issued to Jersey Central Power & Light Company (the licensee), which revised the license for operation of the Oyster Creek Nuclear Generating Station
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(the facility) located in Ocean County, New Jersey.
The amendment is
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effective as of its date of issuance.
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The amendment adds a new license condition (Paragraph 3.G) which re-quires the replacement of core spray spargers during the 1981 refueling outage.
The application for amendment complies with the standards and require-ments of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations.
The Commission has made appropriate i
findings as required by the Act and the Comission's rules and regulations in 10 CFR Chapter I, which are set forth in the license amendment.
Prior public notice of this action was not required since the amendment does not involve a significant hazards consideration.
The Commission has detertined that the issuance of this amendment will not result in any significant environmental impact and that pursuant to 10 CFR j
$51.5(d)(4) an environmental impact statement or negative declaration and environmental impact appraisal need not be prepared in connection with issuance of this amendment.
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For further details with respect to this action, see (1) the application for amendment dated March 31, 1980, (2) Amendment No.
47 to License No. DPR-16, and (3) the Commission's related Safety Evaluation. All of.these items are available for public inspection at the Commission's Public Document Room,1717 H Street, N. W.,
Washington, D. C.
20555, and at the Ocean County Library, Brick Township Branch, 401 Chambers Bridge Road, Brick Town, New Jersey 08723. A copy of items (2) and (3) may be obtained upon request addressed to the U. S. Nuclear Regulatory Commission, Washington, D. C.
20555, Attention:
Director, Division of Licensing.
Dated at Bethesda, Maryland, this 15th day of May,1980.
FOR THE NUCLEAR REGULATORY COMMISSION
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Dennis M. Crutchfield, C ef Operating Reactors Branch #5 Division of Licensing b
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.. o CONGRESSMAN w!LLIAM J HUGHES CANNON MOUSE OFFICE BLDG 327 W A S HIi4GT ON DC 20515 i
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OCEAN COUNTY MAS BEEN INFORMED THAT 9 CRACKS IN THE # CORE SPRAY SPARGER" SYSTEM TWO IN THE OYSTER CREEK NUCLEAR GENERATOR HAS BEEN REPAIRED BY 9 CLAMPS. WE RESPECTFULLY REQUEST YOUR IMMEDIATE
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INTERVENTION TO INSURE GUARANTEES FROM NRC THAT THIS METHOD OF TREATMENT WILL INSURE THE COMPLETE SAFETY OF OCEAN COUNTY CITIZEN 5 AND IS NOT MERFLY A "$COTCH TAPE AND PASTE" J08. PLEASE HELP US A8 SOON AS POSSIBLE.
ROBERT A GASSER FREEHOLDER 10:11 EST MGMCOMP MGM a
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TO REPLY BY MAILGRAM. SEE REVERSE SIDE FOR WESTERN UNION'S TOLL FREE PHONE NUMBERS
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