ML20082V115
| ML20082V115 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/13/1991 |
| From: | Piet P COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20082V117 | List: |
| References | |
| GL-88-01, GL-88-1, NUDOCS 9109230121 | |
| Download: ML20082V115 (4) | |
Text
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1400 Opus Pleco
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Down:ta oron, Illinois 60515 10 CFR 50.00 September 13,1991
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U.S. Nuclear Regulatory Commission ATTN: Documord Control Desk Washington, D.C. 20555
Subject:
LaSailo County Station Units 1 and 2 Supplomont to Application for Amendment to Facility Operating Licensas NPF-11 and NPF 18 Appendix A, Technical Specifications Generic Letter 88 01 NR0_ Docket.Nos,50:373 and50:374
References:
(a) NRC Gonoric Lottor 88 01 dated January 25,1988, *NRC Position on IGSCC in BWR Austonitic Stainless Stool Piping".
(b) W.E. Morgan tottor to U.S. NRC dated July 29,1988, *LaSails County Station Units 1 and 2, Responso to Generic Letter 88-01.*
(c)
P.C. Shemanski letter to T.J. Kovach dated May 1,1989, "LaSailo County Station Units 1 and 2, Generic Lottor 88-01 Rosponse, Roquest for Additionallnformation."
(d)
M.H. Richter letter to U.S. NRC dated June 30,1989, "LaSailo County Station Units 1 and 2 Roquest for AdditionalInformation to Generic Lottor 8841."
(e)
R.M. Pulsifor letter to T.J. Kovach dated Auguct 22,1990, Roview of 2."
ponso to Generic Lotter 88-01, LaSalle County Station, Units 1 and Ros (f)
W.E. Morgan letter to U.S. NRC dated November 5,1990, "LaSalle County Station Units 1 and 2 Rosponso to NRC Roquest for Additional Information Concoming the Review of Responso to Generic Lottor 88-01."
(0)
P.L. Plot letter to U.S. NRC dated April 1,1991, "LaSailo County Station Units 1 and 2, Application for Amendment to Facility Operating Licensos NPF 11 and NPF 18, Appendix A, incorporating the requirements of Genoric Letter 88-01,"
Facility Operating Licensos NPF 11 and NPF 18, Appen(CECO) request for an amendm Referenco (g) subtruttod Commonwealth Edison's dix A, Technical Specifications. The purpose of this supplemental request is to modify the Surveillance Roquiroment of Technical Spocification 4.4,3.2.1 to monitor the primary containment sump flow rato on average onco por 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> not to exceed a time interval of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. A footnote will be added stating that the surveillance will be performed on average once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> not to exceed 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and Surveillanco Requiroment 4.0.2 which allows a 25% extension of the survoillance interval)is not app!! cable to Technical fication 4.4.3.2.1.b. This chango is based upon discussions betwoon representativos of Co and the NRC Staff that transpired during the timo period since the Reference (g) submittal.
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This supplomontal amondment request is subdivided as follows:
1.
Attachmont A gives a dosedption and safety analysis of the proposed changos in this amendment.
2.
Attachmont B Includos the markod-up Technical Spocifications page with tho sequested changes included. The inclusion of the proposed changes from the Hoforenco (g) submittal are provided for continuity. Page 3/4 4 7 for Unit 1 and 3/4 4-0 for Unit 218 the only page affected by this supplomontal roquest.
CECO's original evaluation porformed in accordance with 10CFR50.92(c? that confirmed no significant harards considerations wero involved romains valid and conservat vely bounds this supplemental analysis; thoroforo, the sl nificant hazards conrideretions do not require D
supplementalInformation. CECO's origfnal Environmental Assessment also romains valid.
This proposed amendmont has boon reviewod and approved by CECO On Site and Off Sito Review in accordance with Commonwealth Edison procodinos.
To the best of my knowledge and boliof, the information contained within is truo and correct.
In some respect thoso statomonts are not based on my personal knowlodge, but obtalnod Infonnation furnished by other Commonwealth Edison employnos, contractor employees, and consultants. Such information has been reviewed in accordance with company practico, and I believo it to be reliable.
Commonwcalth Edison is notifying the State of Illinois of this application for amendment by transmitting a copy of thle letter and its attachments to the designated state official.
Pleano dinact any questions you rnay havo concerning this suomittal to this offico.
Very truly yours,
(
M Iotor L. Plot Nuctoar Licensing Administrator Attachments:
A. Dosedption of Safety Analysis of the Proposed Changes B. Marked up Technical Spocification Pages cc:- A.B. Davis - Regional Administrator, Rill Senior Resident inspector LSCS B.L. Slogol NRR, Project Manager Office of Nuclear Facility Safety -lDNS Signod before mo on this fl" day of M L,1991, -
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ATTACHMENT A DESCRIPTION AND SAFETY ANALYSIS OF PROPOSED CHANGES TO APPENDIX A, TECHNICAL SPECIFICATIONS OF FACILITY OPERATING LICENSES NPF 11 AND NPF 18 Generic Letter 88-01 presents the NRC Staff positions on issues related to Intergranular stress corrosion cracking (IGSCC) near weldments in BWR piping. The generic letter requestod that licen6m s provide responses regarding the Implomontation of these staff positions. In July 1988, LaSailo County Station provided its initial response to Generic Letter 88-01. This submittal was followed by a series of requests from the NRC Staff for additional informntion and supplomontal responsos by CECO (References (b)-(0)). In Referenco (dments f),
LaSalle County Station committed to submit a request for Technical Specification amen required by the Gont :.c Letter. This submittal was made on April 1,1991 in Reference (g). In this response, LaSalle Station took exception to the generic letter requiremont to monitor the containment sump flow rate at least onco por 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
The "shiftly" survolilance intervalis defined in Table 1.1 of the LaSalto Station Technical Specifications as "at least once por 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />." There are nu other Survoillanco Requirements (SR) within Section 4.4.3 of the Technical Specifications that require an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> timo interval. Technical Specification 4.4.3 currently contains a Surveillance Requirement to monitor the primary containment sumn flow rate at least once por 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Current LaSalle Station practico is to perform Technicut Specification "shiftly" surveillances three times daily (onco during each shift: 11;00pm 7:00am,7:00am - 3:00pm, ar.d 3:00pm - 11:00pm). This practico results in the surveillance being performed on averago ovary 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />sl thoreforo, LaSallo Station concluded they were meeting the intentions f the regulrements specified in Generic Lottor 88 01.
Following the submittal of the Inillal Technical Spocification amendmont roquest, 'ho NRC Staff notified CECO that LaSalle's position concerning the surveillanco interval was not acceptable. NRC Staff concerns centered on the implied acceptability of up to a 15 hour1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> time interval betwoon performarco of this surveillar ce (12 plus 3 additional hours ellowed by SR 4.0.2). The NRC Staff requestod that a supplomont be provided to roduco tin survollianco period from a maximum interval of 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> (12 plus 3 additional hours allowed by SR 4.0.2) to a maximum Interval not to exceed 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. A footnote is added to Toch.1l cal Specification 4.4.3.2.1.b stating that the surveillance will be performed on average onco per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> not to exceed 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and SR 4.0.2 (which allows a 25% extension of a survolliance Interval) will not be applicablo.
CONCLUSION The surveillance timo interval for Technical Specification 4.4.3.2.1.b (for both Unit 1 and Unit 2) !s being amended to a maximum timo interval not to oxceed 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. This amendment is administrativo in nature and has no impact on plant safety. The proposed supplomont does not constitute a change to the facility or the operation of the facility as described in the UFSAR. These revisions do not adversely affect any of the accident Initiators or Initial assumptions used in the plant accident analyses.
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l ATTACHMENT D l
1 PROPOSED CHANGES TO APPENDIX A, TECHNICAL SPECIFICATIONS OF FACILITY OPERATING LICENSES NPF-11 AND NPF 18 l
BEYME 2 AGES UNIT.ONE (NPE 1_1)
UNIT _TWO.(NPF 16) 3/403 3/403 3/4 4-7 3/4 4-8 l
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