ML20097A347
| ML20097A347 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/28/1992 |
| From: | Creel G BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-M83076, TAC-M83077, NUDOCS 9206020283 | |
| Download: ML20097A347 (2) | |
Text
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e BALTIMORE GAS AND ELECTRIC 1650 CALVERT CUFFS PARKWAY. LUSBY, MARYLAND 20657-4702 GEomot C. CREEL VICE PRE $rD$NT 540CLE AR ENERGY (40)260-4455 May 28,1992 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Dcsk
SUBJECT:
Calvert Cliffs Nucicer Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Supplement to License Amendment Request on Steam Generator Insocctions (TAC No. M830N M8307h
REFERENCE:
(a)
Letter from Mr. G. C. Creel (BG&E) to NRC Document Control Desk, dated March 25, 1992, License Amendment Request; Steam Generator Inspections Gentlemen:
The Baltimore Gas & Electric Company wishes to provide additional information to support our request for license amendment (Reference a). Thu supporting information does not affect the determination of signiGcant hazards provided in Reference (a), nor does it alter the requested changes.
Change 2 in Reference (a) requested a one-time variance for Calvert Cliffs Unit 2 from the proposed requirement to examine at least 20 percent of the steam generator tubes to support extending the inspection frequency beyond 24 months. The justification for this one-time variance included the good steam generator chemistry control in the shutdown period between the 100 percent inspection of the Unit 2 steam generator tubes in April 1989, and the inspection of 15% of the steam generatot tubes in October 1990 prior to startup.
In support of this one-time varit.nce for Unit 2. BG&E wishes to offer further evidence of the good condition of the Calvert Cliffs steam generators. The Unit I steam generators were controlled to the same chemistry requirements during the 1989-1990 shutdown as were the Unit 2 steim generators.
An inspection of the Unit 1 steam generators just completed during the current Unit 1 ret'ucling outage revealed little degradation. Only 18 of the 1.6,861 tubes inspected full length with the bobbin coil were plugged as a result of eddy current indications. In addition,3-coil Motorized Rotating Pancake Coil (MRPC) examination was conducted or 25% of the hot leg tube-to-tube sheet exmnsion zone region in each steam generator. No cracking was detccted. We believe this evidence supports BG&E's request to delay the next Uni: 2 steam generator inspection until the next scheduled refueling outage in March 1993.
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Document Control Desk May 28, i992 Page 2 I
We request that you consider these results when considering the one. time variance for Unit 2.
Should you have any further questions regarding this matter, we will be pleased to discuss them with j
you.
j Very truly yours,
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STATE OF MARYLAND :
I TO WIT :
COUNTY OF CALVERT I hereby certify that on the c2 7 day of _
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,1992,be e me, the subscriber, a Notar Public of the State of Maryland in arid for /'A / n eAf 4.tLi7u-persona
- npeared George C. Creel, being duly sworn, and states that he is Vice PredJent of the Baltimort a nd Electric Company, a corporation of the State of Maryland; that he provides the foregoinsesponse for the purposes therein set forth; that the statements made are true and correct to the best of his knowledge, information, and be'ief; and that he was authorized to provide the response on behalf of said Corporation.
WITNE*38 my Hand and Notarial Scal:
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My Commission Expires:
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zpate' GCC/BDM/bdm/ dim cc:
D. A. Brune, Esquire l
J. E. Silberg. Esquire I
NRC Document Control Desk R. A. Capra, NRC D. G. Mcdonald, J r., NRC l
T. T. Martin, NRC L E. Nicholson, NRC l
R. I. McLean, DNR j
J. H. Walter, PSC l
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