ML20147B119
| ML20147B119 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/26/1978 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7810050174 | |
| Download: ML20147B119 (2) | |
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METROPOLITAN EDISON COMPANY cueswun ar aenem pueuc ununes conpana rios,/
POST OFFICE 80X 542 READING, PENNSYLVANIA 19603 TELEPHONE 215 - 929-3601 September 26, 1978 G01 1k80
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4 Director of ?Iuclear Reactor Regulation Attn:
R. W. Reid, Chief Operating Reactors Branch No. h U. S. Nuclear Regulatory Commission R
Washington, D. C.
20555
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Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMT-1)
Operating License No. DPR-50 Docket No. 50-289 In Met-Ed's letter of April 8,1976 (Gol 0506), specifically in response to Question le of a set of questions from an NRC letter of March 29, 1976, con-cerning Cycle 2 Reload, Met-Ed committed to verifying core flow rate within 3 months following refueling and every 6 months + 30 days thereafter.
The purpose was to ensure that the core flow rate at 100% power remained above 106.5% of the design flow rate so that the analysis resulting in the pover/
flow trip and/or overpressure trip setpoints remained conservative.
The flow rate reported for Cycle 1 in GQL 0506 was approximately 1095.
Since that initial cccmitment, the core flow rate has been measured 9 times, varying between 109.5% and 111.1% o" Cycle 1 design flow.
A summary table is presented below.
Test Date
% of Cycle 1 Desien P_ov 6-15-76 110.hl 11-5-76 110.65 2-9-77 111.11 5-21-77 109.73 7-29-77 110.26 10-25-77 109.89 l-29-78 109.51 5-8-78 110.55 7-26-78 110.68 In view of the above results, Met-Ed proposes to change the frequency of flow verification tests to once per cycle, within 90 days of resumption of
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R. W. Reid, Chief
_2-September 26, 1978 GQL 1h80 j
power operation following refueling. Met-Ed requests NRC approval of this proposed change.
1 Sincerely,
'/J.
. Herbein
', ', ' Vice President-Generation j
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