ML20004F426
| ML20004F426 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/12/1981 |
| From: | Hukill H METROPOLITAN EDISON CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| L1L-180, NUDOCS 8106180330 | |
| Download: ML20004F426 (2) | |
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O Metropolitan Edison Company Met-Ed GPU
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Middletown, Pennsylvania 17057 Writer's Direct Dial Number June 12, 1981 L1L 180 Office of Nuclear Beactor Regulation Attn: John v. Stolz, Chief Operating Reactora Branch No. 4 U. S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Sir:
Three Mile Island Muclear Station, Unit 1 (TMI-1)
Opurating License No. DPR-50 Docket No. 50-289 i
Environmental Qualification for Small Break LOCA The purpose of this letter is to confirm informatioit transmitted by telephone June 5 to June 11, 1981 for clarification of our submittal dated May 18, 1981 (L1L 161).
Sincerely,
. D.
kill Director, TMI-l HDH:CWS:1ma Enclosure cc:
R. Jacobs ed D. DiIanni D
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f 8106I80330 Metropolitan Edrson Company is a Member of the General Public Utilities System
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Enclorura L1L 180 Question: What radiation levuls are expected in the vicinity of Valves DH-V-4A/B and DH-V-5A/B during normal operation and during DH System operation?
Answer:
General area dose rates in the vicinity of DH-V-4A/B and DH-V-5A/B are less than 100mr/ hour * (and usually much less than 100er/hr) during either normal operation or DH System operation. This is based on routine radiation surveys taken since TMI-1 began operation.
Question: Will GPU review the results of the Westinghouse tests on Reliance motors used on Limitorque actuators? Will GPU advise the NRC if these test resultu are applicable to TMI-1 and the effects, if any?
Answer:
All information that GPU has reviewed to date indicates that the Reliance motors used in TMI-l Limitorque actuators are qualified as specified in our 79-01B submittal.
GPU will. review and consnent to the NRC on the Westinghouse reports.after the NRC makes the reports available to GPU.
Question: Do the failures on Foxboro transmitters, described in test i
report T3-1068, affect the qualification of the TMI-l transmitters? Are these the same type of units?
7 Answer:
All units in this report continued to function up to 7.6 x 10 R.
This is orders of magnitude above the SB LOCA radiation' for TMI-1.
The TMI-l t'ransmitters are of the same type as these tested.
Question: When will the B & W Report " Evaluation of Aging of Class IE Controls and Instrumentation in B & W 177FA Scope of Supply" be completed?
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Answer:
B & W has stated that the report should be published by July 15, 1981.
L The report is being sponsored by the B & W Owners Group and its
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publication is under control of B & W and the Owners Group.
l Question: Will all components that have exceeded their qualified life expectancy be replaced before Restart? Will a program to replace components, as needed, be in place by Restart?
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Answer:
Yes. The only such components identified to date are neoprene cover seal gaskets. In addition, a procedure will be implemented by
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criticality to replace components as needed.
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- 100 mr/hr may be briefly exceeded for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following a shutdown involving a large crud burst.
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