ML20205L146
| ML20205L146 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/27/1986 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| 5211-86-2053, NUDOCS 8604030221 | |
| Download: ML20205L146 (2) | |
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GPU Nuclear Corporation g
gf Post Office Box 480 Route 441 South Middletown, Pennsylvania 17057 0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:
March 27, 1986 5211-86-2053 l
Office of Nuclear Reactor Regulation Attn. John F. Stolz, Director PWR Project Directorate No. 6 U.S. Nuclear Regulatory Commission Washington, D. C. 20555
Dear Mr. Stolz:
Three Mile Island Nuclear Station Unit 1 (THI-1)
Operating License No. DPR-50 Docket No. 50-289 Extension to 10 CFR 50 Appendix H In accordance with the reactor vessel material surveillance program for THI-1, surveillance capsule TMI-lc was inserted in a host reactor.
The capsule was withdrawn March 28, 1985.
10 CFR 50, Appendix H, Section III. A requires a technical report of test results to be submitted within one year af ter capsule withdrawal. We will be unable to submit the report within the one year period and request an_ extension until May 5,1986.
As part of the B&W Owners Group Integrated Surveillance Program, B&W was to perform an analysis on five capsules, three of which were withdrawn from our host reactor on March 28, 1985 including TMI-lC.
Due to conflicting outage priorities for the host reactor, the capsules were shipped to B&W for analysis a month later than anticipated.
B&W resources were impacted in providing a response to Pressurized Thermal Shock regulations and the developrent of the ex-vessel. dosimetry program.
In addition, B&W tension testing equipment failed just prior to testing the TMI-1 capsule.
This caused approximately a two week delay in testing.
B&W was unsuccessful in making up for the delays and was unable to meet the schedule for completion of the technical report.
This test data is of no immediate safety significance since the current THI-l P-T curves, based on the results from a previously withdrawn THI-1 capsule, are valid through 5 EFPY of operation, which will not be reached until Cycle 6.
Preliminary test results from the specimens from capsule THI-lC indicate that RTPTS will be more favorable than originally projected. These results are consistent with other data that has been generated in the B&W Owners Group Integrated Surveillance Program.
8604030221 860327 DR ADOCK 05000289
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GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation i O 4,
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.5211-86-2053 March 27, 1986 Based on the above, under the provisions of 10 CFR 50, Appendix H, Section III.A, we request the extension until May 5,1986 to file the report specified in 10 CFR 50, Appendix H, Section III.B.
L Sincerely, c
l D.
111 Director, TMI-1 L
HDH/SM0/spb:0535A cc:
J. Thoma l-l l
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