ML14184B088
| ML14184B088 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 08/17/1993 |
| From: | Mozafari B Office of Nuclear Reactor Regulation |
| To: | Dietz C Carolina Power & Light Co |
| References | |
| TAC-M86105 NUDOCS 9308200140 | |
| Download: ML14184B088 (4) | |
Text
REGJ UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 17, 1993 Docket No. 50-261 Mr. C. R. Dietz, Vice President Carolina Power & Light Company H. B. Robinson Steam Electric Plant, Unit No. 2 Post Office Box 790 Hartsville, South Carolina 29550-0790
SUBJECT:
REVIEW OF THE RESULTS OF THE CABLE AMPACITY STUDY FROM H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 (TAC NO. M86105)
The electrical safety system functional inspection (SSFI) was performed at H. B. Robinson Steam Electric Plant, Unit No. 2 (HBR2) in 1987. The SSFI team report identified a lack of documentation and engineering analyses to demonstrate that the power cables have adequate ampacity ratings to carry
.sufficient loads to perform their intended safety function. As a result of the SSFI, Carolina Power & Light Company (CP&L or the licensee) conducted a cable ampacity study as a part of the electrical design basis reconstitution (DBR) effort. By letter dated October 31, 1988, the NRC requested that CP&L provide the results of their study to the staff when completed. By letter dated March 17, 1993, the licensee submitted the results of the cable ampacity study which demonstrates that power cables in the reactor auxiliary building and containment building (areas containing safety-related cables) have adequate ampacity ratings.
The NRC staff has reviewed the submittal and noted that the CP&L study identified 608 power cables requiring evaluation and that the licensee concluded all the cables in the reactor auxiliary and the containment buildings have adequate ampacity ratings to carry their required loads. This conclusion is based on the application of the design basis standard that was in place at the time of plant construction, Insulated Power Cable Engineers Association (IPCEA) Standard P-46-426 and P-54-440.
Based on our review of the licensee's submittal, we concur with the licensee's conclusion that power cables in the reactor auxiliary and containment buildings have adequate ampacity ratings to carry sufficient loads to perform their intended safety function. Therefore, we conclude that the concern regarding the licensee's lack of documentation and analyses for the power 9308200140 930617 PDR ADOCK 05000261 P
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cable ampacity ratings has been resolved. We also understand that the study will be modified and documented as a part of the electrical DBR effort when future plant modifications are made.
This completes our effort on TAC No. M86105.
Sincerely, Original signed by:
Brenda Mozafari, Project Manager Project Directorate II-1 Division of Reactor Projects -
I/II Office of Nuclear Reactor Regulation cc:
See next page DISTRIBUTION NRC & Local PDRs PD#21 Reading File S. Varga G. Lainas S. Bajwa B. Mozafari P. Anderson C. Berlinger P. Gill P. Kang OGC ACRS (10)
E. Merschoff Region II cc:
Plant Service list OFFICE L :
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//1/93 I / 7/93 Document Name: ROB86105.LTR
Mr. C. R. Dietz H. B. Robinson Steam Electric Carolina Power & Light Company Plant, Unit No. 2 cc:
Mr. H. Ray Starling Mr. Dayne H. Brown, Director Manager - Legal Department Department of Environmental, Carolina Power & Light Company Health and Natural Resources Post Office Box 1551 Division of Radiation Protection Raleigh, North Carolina 27602 Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. H. A. Cole Special Deputy Attorney General Mr. Robert P. Gruber State of North Carolina Executive Director Post Office Box 629 Public Staff -
NCUC Raleigh, North Carolina 27602 Post Office Box 29520 Raleigh, North Carolina 27602052 U.S. Nuclear Regulatory Commission Resident Inspector's Office Mr. Heyward G. Shealy, Chief H. B. Robinson Steam Electric Plant Bureau of Radiological Health Route 5, Box 413 South Carolina Department of Health Hartsville, South Carolina 29550 and Environmental Control 2600 Bull Street Regional Administrator, Region II Columbia, South Carolina 29201 U.S. Nuclear Regulatory Commission 101 Marietta St., N.W., Ste. 2900 Mr. H. W. Habermeyer, Jr.
Atlanta, Georgia 30323 Vice President Nuclear Services Department Mr. Ray H. Chambers, Jr.
Carolina Power & Light Company Plant Manager Post Office Box 1551 Carolina Power & Light Company Raleigh, North Carolina 27602 H. B. Robinson Steam Electric Plant Post Office Box 790 Hartsville, South Carolina 29550 Public Service Commission State of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211