ML20235Z603
| ML20235Z603 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 03/06/1989 |
| From: | Morris K OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-011, IEB-88-11, LIC-89-267, NUDOCS 8903160010 | |
| Download: ML20235Z603 (3) | |
Text
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Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 2247 402/536 4000 March 6, 1989 LIC-89-267 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P]-137 Washington, DC 20555
References:
1.
Docket No. 50-285 2.
NRC Bulletin 88-11 " Pressurizer Surge Line Thermal Stratification" dated December 20, 1988 3.
Letter from 0 PPD (K. J. Morris) to NRC (Document Control Desk) dated January 18, 1989 (LIC-89-050) 4.
Letter from CE Owners Group (P. W. Richardson, Jr.) to CE0G Analysis Subcommittee dated February 17, 1989 (CE0G-89-095)
Gentlemen:
SUBJECT:
Schedule For Completing Remaining Actions in NRC Bulletin 88-11.
Omaha Public Power District (0 PPD) received the subject Bulletin, Reference 2, on January 5, 1989.
A partial response, Reference 3, which included the initial evaluation of the pressurizer surge line and its restraints, committed to provide a schedule for the completion of the remaining actions requested in Bulletin 88-11.
The purpose of this letter is to inform the staff of actions taken to resolve NRC concerns associated with Pressurizer Surge Line Thermal Stratification and to request an alternate schedule for completion of the action items.
The Combustion Engineering Owners Group (CE0G) became aware of this issue in April of 1987 when INP0 issued a draft SER on surge line thermal cycling observed in a German nuclear plant.
The CE0G proceeded to initiate a data collection program in June 1987 followed by actual data collection activities at two CE0G plants in June and August of 1988.
In October 1988, the CE0G authorized the ongoing CE0G 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 subsequent-ly issued in December 1988. Action No. 1.b requested that within four months of receipt of the Bulletin, licensees of plants in operation ever ten years demonstrate that the pressurizer surge line meets 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 tht.n ten years were requested to complete the analysis within one year. Thest NRC
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i LIC-89-267 Page 2 Bulletin items prompted the CE0G to request a meeting with the NRC staff.
The NRC staff and the CE0G met on February 13, 1988 in the White Flint NRC offices.
During this meeting, the CE0G presented the goals and scope of the ongoing CE0G surge line program which included a presentation of actual plant data and a discussion on the issue of thermal striping.
The CE0G then requested relief from the four month /one year schedule requirement in Requested Action 1.b and suggested that the CE0G program be allowed to proceed on schedule.
As a result of this meeting, the CE0G and NRC staff agreed on several action items to be completed as follows:
1.
The CEOG will preform a preliminary bounding evaluation of CE0G surge lines using actual data collected from CE0G plants by July 1,1989.
This activity will address the intent of Requested Action 1.b.
2.
Actual plant data will be used to define loading conditions for input to the fatigue and stress evaluations.
3.
The CE0G agreed to meet with NRC staff to discuss the load definitions prior to finalizing the bounding analysis described in item 1 above.
Therefore, per the agreements between the CE0G representatives and the NRC staff, as documented in Reference 4, OPPD requests an extension of the Item 1.b due date to July 5, 1989. This schedule extension is necessary in order to effectively use the shared data and generic approach as discussed above.
OPPD is a participant in the CE0G program and agrees to support the above action items and the alternative schedule for responding to NRC Bulletin 88-11 Action 1.b.
Therefore, per Reporting Requirement Item 2, we are requesting an alternate schedule for the completion of Item 1.b by July 5,1989 with the subsequent notification letter, Reporting Requirement Item 3, to be submitted to the NRC on or before August 5, 1989. The long term corrective action to update the stress and fatigue analyses as applicable, requested per Item 1.d, would be January 5, 1991.
This response is being submitted under oath pursuant to the provisions of Section 182a of the Atomic Energy Act of 1954 as amended.
If you have any questions concerning this matter, do not hesitate to contact us.
Sincerely, h/W K.LJ.
orris Division Manager l
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LeBoeuf, Lamb, Leiby & MacRae R. D. Martin, NRC Regional Administrator P. D. Milano, NRC Project Manager P. H. Harrell, NRC Senior Resident Inspector q
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION I
In the Matter of
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l Omaha Public Power District
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Docket No. 50-285 (Fort Calh.'un Station
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Unit No. 1)
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I AFFIDAVIT K. J. Morris, being duly sworn, hereby deposes and says that he is the Division Manager - Nuclear Operations of the Omaha Public Power District; that as such he is duly authorized to sign and file with the Nuclear Regulatory Commission the attached information concerning the response to NRC Bulletin 88-11; that he is familiar with the content thereof; and that the matters set forth therein are true and correct to the best of his knowledge, information, and belief.
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'K.' Q( M6rfI's Division Manager Nuclear Operations STATE OF NEBRASKA)
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ss COUNTY OF DOUGLAS) to before me, a Notary Public in and for the State of Subscribedandsworn/h I
Nebraska on this I
day of March,1989.
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