ML20113H485
| ML20113H485 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs, Sequoyah  |
| Issue date: | 07/30/1992 |
| From: | Creel G BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9208040033 | |
| Download: ML20113H485 (2) | |
Text
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l BALTIMORE GAS AND ELECTRIC
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1650 CALVERT CLIFFS PARKWAY. LUSBY. MARYLAND 20657 4702 oronor c cacc' July 30,1992 v r e.e.w,c.n
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U. S. Nuclear Regulatory Commission Washington, DC 20555 NITENTION:
Document Control Desk SU11 JECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2: Docket Nos. 50-317 & 50-318 NRC Region I inspection Report Nos. 50-317/92 05 and 50-318/92-05
[Esbluary 1014. tw21
REFERENCE:
(a)
Letter from Mr. J. P. Durr (N RC) to Mr. G. C. Creel (11G& B), NRC Region I inspection Report Nos. 50-317N2-05 and 50-3492-05 (February 1014,1992), dated April 6,1992 Gentlemen:
Reference (a) documented a Combined Special Inspection of Electrical Cable Separation issues at Calvert Cliffs, Units 1 and 2.
It requested supporting documentation justifying changes to the Updated Final Safety Analysis Report (UFSAR) relative to referencing IEEE 6.5 as guidance in support of en OPERAlllLITY determination performed for the existing configuration in the Units 1 and 2 Cable Spreading Rooms. We are unable to supply the requested justification and offer the following explanation in response to your request.
In response to identified deficiencies in cable routing in the Calvert Cliffs Units I and 2 Cable Spreading Rooms, an action plan was developed to bring the existing cable configuration into full conformance with the original design described in the UFSAR. This action plan involved a corrective activities schedule extending into future Unit 1 and 2 refueling outages Concurrent with the development of the proposed activities schedule, we performed an operability evaluation. As part of this evaluation, we used a working document (IEEE 6.5) which had not been approved by the Nuclear Regulatory Commission. This document was used as an accompanying basis for evaluating the existing configuration and justifying operability for interim continued operation cf both Units.
-We continue to believe that the technical rationa!c for thi:. draft guidance supports the reasonable assurance necessary for operation w hile we continue our ongoing efforts to restore full conformance, in a'well intentioned effort to document the basis justifying continued operation the information referencing IEEE 6.5 was included in the next annual revision to the UFSAR. In resiewing the information we concur with the inspection report that the information should net have been reflected in the UFSAR.
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- Document Control Desk July 30,1992 Page 2 We never intended to permanently maintain the plants in this revised configuration. We have i
reviewed subsequent engineering activities to ensure that no inappropriate decisions were caused by i
misinterpreting the information as our licensed basis. None were found. We have subsequently revised the UFSAR to remove the material related to IEEE 6.5.. interim quidance was provided to design enginects until site-wide 50.59/ Operability Deterrnination Trair..g is conducted later this year.
Inasinuch as the material regarding IEEE 6.5 was never intended to supersede the original basis for cable separation, no further documentation regarding its applicability or adequacy beyond that reviewed by the inspection team exists.
Should you have any further questions regarding this matter, we will be pleased to t'iscuss them with you.
Very truly yours,
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