ML20214T298

Forwards Safety Evaluation Supporting 860213,0505 & 0825 Responses to Requirements of PTS rule,10CFR50.61 Re Fracture Toughness Requirements for Protection Against PTS Events. Future pressure-temp Submittals Should Have Reevaluation

ML20214T298
Person / Time
Site:	Crane
Issue date:	11/25/1986
From:	Thoma J Office of Nuclear Reactor Regulation
To:	Hukill H GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20214T301	List: ML20214T298 ML20214T351
References
CON-#486-1809, REF-GTECI-A-49, REF-GTECI-RV, TASK-A-49, TASK-OR SP, NUDOCS 8612080548
Download: ML20214T298 (3)

Text

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g November 25, 1986 Docket No. 50-289 Distribution:

Docket File NRC & L PDRs Branch Files JThema TRoss Ringram RWeller Mr. Henry D. Hukill, Vice President EJordan JPartlow and Director - TMI-1 BGrimes 0GC GPU Nuclear Corporation ACRS FMiraglia P. O. Box 480 GVissing Llois Middletown, Pennsylvania 17057 PNRandall

SUBJECT:

PROJECTED VALUES OF MATERIAL PROPERTIES FOR FRACTURE TOUGHNESS REQUIPEMENTS FOR PROTECTION AGAINST PRESSURIZED THERHAL SHOCK EVENTS We have reviewed the information for TMI-1 provided in your letters dated January 23, 1986, May 5, 1986, and August 25, 1986 which were submitted in response to the requirements of the Pressurized Thermal Shock (PTS) Rule, 10 CFR 50.61. We have found the material properties of reactor vessel beltline materials, the projected fluence at the inner surface of the reactor vessel for the end of life of the plant, and the calculated RT f r the end of life of the plant to be acceptable. The calculated RT iEThqualtobut doesnotexceedthescreeningcriterionof270FattheeEhrationdateofthe license, and therefore, meets the requirements of the PTS Rule.

The PTS Rule requires that the projected assessment of the RT must be updatedwheneverchangesincoreloadings,surveillancemeasuENentsorother infonnation (including changes in capacity factor) indicate a significant change in the projected values. This ensures that licencees will track the accumulated fluence for the limiting beltline materials throughout the life of the plant to verify that their assumptions remain valid.

In this regard, we request that future Pressure-Temperature submittals (renvired by 10 CFR 50, Appendix G1 also contain a reevaluation of the RT and'a comparison with the predicted value. This periodic reevaluation Ehuirement is particularly important for TMI-1 because the calculated RT is equal to the screening PTS criterion.

Our associated Safety Evaluation is enclosed.

Sincerely,

/S/

John 0. Thoma, Project Manager PWR Project Directorate #6 Division of PWR Licensing-B

Enclosure:

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Mr. Henry D. Hukill Three Mile Island Nuclear Station, GPU Nuclear Corporation Unit No. I cc:

Mr. R. J. Toole Mr. Richard Conte O&M Director, TMI-1 Senior Resident ' Inspector (TMI-1)

GPU Nuclear Corporation U.S.N.R.C.

Middletown, Pennsylvania 17057 P.O. Box 311 Middletown, Pennsylvania 17057 Richard J. McGoey Manager, PWR Licensing Regional Administrator, Region I GPU Nuclear Corporation U.S. Nuclear Regulatory Comission 100 Interpace Parkway 631 Park Avenue Parsippany, New Jersey 70754 King of Prussia, Pennsylvania 19406 Mr. C. W. Smyth Mr. Robert B. Borsum TMI-1 Licensing Manager Babcock & Wilcox GPU Nuclear Corporation Nuclear Power Generation Division P. O. Box 480 Suite 220, 7910 Woodmont Avenue Middletown, Pennsylvania 17057 Bethesda, Maryland 20814 Ernest L. Blake, Jr., Esq.

Governor's Office of State Planning Shaw, Pittman, Potts & Trowbridge and Development 2300 N Street, N.W.

ATTN: Coordinator, Pennsylvania Washington, D.C.

20037 State Clearinghouse P. O. Box 1323 Sheldon J. Wolfe, Esq., Chairman Harrisburg, Pennsylvania 17120 Atomic Safety and Licensing Board U.S. Nuclear Regulatory Comission Mr. Larry Hochendoner Washington, D.C.

20555 Dauphin County Comissioner Dauphin County Courthouse Mr. Frederick J. Shon Front and Market Streets Atomic Safety and Licensing Board Harrisburg, Pennsylvania 17101 U.S. Nuclear Regulatory Comission Washington, D.C.

20555 Mr. David D. Maxwell, Chairman Board of Supervisors Dr. Oscar H. Paris Londonderry Township Atomic Safety and Licensing Board RFD#1 - Geyers Church Road U.S. Nuclear Regulatory Comission Middletown, Pennsylvania 17057 Washington, D.C.

20555 Mr. Thomas M. Gerusky, Director Atomic Safety & Licensing Board Panel Bureau of Radiation Protection U.S. Nuclear Regulatory Comission Pennsylvania Department of Washington, DC 20555 Environmental Resources P. O. Box 2063 Atomic Safety & Licensing Appeal Harrisburg, Pennsylvania 17120 Board Panel (8)

U.S. Nuclear Regulatory Commission Thomas Y. Au, Esq.

Washington, D.C.

20555 Office of Chief Counsel Department of Environmental Resources Docketing and Service Section 505 Executive House Office of the Secretary P. O. Box 2357 U.S. Nuclear Regulatory Comission Harrisburg, Pennsylvania 17120 Washington, D.C.

20555 l

Ms. Louise Bradford l

TMIA 1011 Green Street Harrisburg, Pennsylvania 17102 l

Mr. Henry D. Hukill Three Mile Island Nuclear Station GPU Nuclear Corporation Unit 1 TMIA 315 Peffer Street Harrisburg, Pennsylvania 17102 Bruce W. Churchill, Esq.

Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W.

I Washington, D.C.

20037 I

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