ML20214V213
| ML20214V213 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/22/1986 |
| From: | Tiernan J BALTIMORE GAS & ELECTRIC CO. |
| To: | Thadani A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8610020202 | |
| Download: ML20214V213 (2) | |
Text
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BALTIMORE GAS AND ELECTRIC CHARLES CENTER R O. BOX 1475 BALTIMORE, MARYLAND 21203 JosEPN A.TIEftNAN vice passioca' September 22, 1986 NucLEAn ENERGY U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C. 20555 ATTENTION: Mr. Ashok C. Thadani, Director PWR Project Directorate #8 Division of PWR Licensing-B
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Emergency Request for Amendment
REFERENCE:
(a)
Letter from Mr. 3. A. Tiernan (BG&E), to Mr. A. C. Thadani (NRC),
dated September 19,1986, same subject (b)
Letter from Mr. S. A. McNeil (NRC), to Mr. 3. A. Tiernan (BG&E),
dated September 8,1986, Amendment to Facility Operating License Gentlemen:
STATEMENT OF EMERGENCY CIRCUMSTANCES The Technical Specification (TS) involved in Reference (a) would, unless amended, require shutdown of one or both reactors. The conditions leading to this situation could not have been reasonably anticipated.
A series of diesel tests were undertaken af ter the approval of an interim TS change by the NRC to determine the source of CO leakage into the Jacket Coolant Water (3CW)
System.
It was anticipated that the source of the leakage would be identified and repaired within this period. However, due to the nature of the defect we were not able to identify the source of the leakage until September 18, 1986. We discovered a crack in No.12 cylinder liner of No.12 Diesel Generator (DG). We promptly determined whether the crack could safely be repaired during operations and made arrangements to assure additional back-up power supplies during the period needed for this repair. We promptly requested that the TS be further amended to permit the required repairs.
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PDR ADOCK 0D000317 6
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Mr. Ashok C. Thadani September 22,1986 Page 2 In addition to the tests and repairs we have done to date, we will examine all other cylinder liners and adapter ports in No.12 DG using the same testing techniques we used to discover the crack in No.12 liner. We will use the freon and dye penetrant tests we explained to you in earlier discussions.. Furthermore, a hydrostatic test will be done on the DG's JCW system.
Should you have further questions regarding this matter, please do not hesitate to contact us.
Very truly yours, WWW STATE OF MARYLANO :
TO WIT:
CITY OF BALTIMORE Joseph A. Tiernan, being duly sworn states that he is Vice President of the Baltimore Gas and Electric Company, a corporation of the State of Maryland; that he provides the foregoing response for the purposes therein set forth; that the statements made are true and correct to the best of his knowledge, information, and belief; snd that he was authorized to provide the response on behalf of said Corporation.
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f-M-3'[o Date JAT/SRC/gla Attachments cc:
D. A. Brune, Esquire
- 3. E. Silberg, Esquire S. A. McNeil, NRC T., Foley, NRC T. Magette, DNR
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