ML20235Y571
| ML20235Y571 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/03/1989 |
| From: | Creel G BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-011, IEB-88-11, NUDOCS 8903140338 | |
| Download: ML20235Y571 (2) | |
Text
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A BALTIMORE OAS AND I
ELECTRIC CHARLES CENTER. P.O. BOX 1475 BALTIMORE, MARYLAND 21203 March 3,1989 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 NRC Bulletin 88-II. Pressurizer Suree Line Thermal Stratification l
Gentlemen:
In accordance with Reporting Requirement No. 2 of the subject Bulletin, the purpose of this letter is to justify an alternative schedule for actions requested.
The Combustion Engineering Owners Group (CEOG) became aware of this issue in April 1987, when INPO issued a draft SER on surge line thermal cycling observed in a German nuclear plant. The CEOG proceeded to initiate a data collection program in June 1987, followed by actual data collection activities at two CEOG plants in June and August 1988.
In October 1988, the CEOG authorized the ongoing CEOG program, " Reduction and Analysis of Pressurizer Surge Line Data Collected from CEOG Plants," to address surge line thermal stratification concerns. NRC Bulletin 88-11 was subsequently issued in December 1988. Action No. 1.b requested that within four months of receipt of the Bulletin, licensees of plants in operation over ten years demonstrate that pressurizer surge lines meet the applicable design codes and other regulatory commitments for the licensed life of the plant. The staff suggested that this could be accomplished by performing a plant-specific or generic bounding analysis. Licensees of plants in operation less than ten years were requested to complete the analysis within one year.
The NRC Bulletin items prompted the CEOG to request a meeting with the NRC staff.
On February 13, 1988, the CEOG met with the NRC staff to present the goals and scope of the ongoing CEOG surge line program. This included a presentation of actual plant data and a discussion on the issue of thermal striping. The CEOG then requested relief from the four-month /one-year schedule requirement in Requested Action Item 1.b and suggested that the CEOG program be allowed to proceed on schedule.
The NRC staff did not believe total relief was justified, but the CEOG and NRC staff agreed on action items to be completed as follows:
1.
The CEOG will complete a preliminary bounding evaluation of CEOG surge lines using actual data collected from CEOG plants by July 1,
1989. This activity will address the intent of Requested Action Item 1.b.
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o Document Control Desk March' 3,1989 Page 2 2.
Actual plant data will be used to define loading conditions for input to the fatigue and stress evaluations.
3.
The CEOG will meet with NRC staff to discuss the load definitions prior to finalizing the bounding analysis described in Item I, above.
Baltimore Gas and Electric agrees to support the above action items and alternative schedule. Our response addressing Requested Item Action 1.b will be submitted by July 17,1989.
Should you have any further questions regarding this matter, we will be pleased to discuss them with you.
Very truly yours, L
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Georg C. Creel Vice President - Nuclear, ergy STATE OF MARYLAND 6
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I hereby cert fy that on the b day of bll
,1 N, before me, the subsjriber,j Notary Public of the State of Maryland in and for A /1(MZ cAMLP
, personally appeared George C. Creel, being duly sworn, and states that he is & ice 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; and that he was authorized to provide the response on behalf of said Corporation.
Ad b lf WITNESS my lland and Notarial Seal:
Notary Public
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My Commission Expires:
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- ' March' 3,1989 l
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cc:
' D. A.' Brune',' Esquire J. E.
Silberg, Esquire R.- A.Capra, NRC S. - A.McNeil, NRC W..T.~ Russell, NRC V. L. Pritchett, NRC T. Magette, DNR 1
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