ML14183A746
| ML14183A746 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 07/08/1996 |
| From: | Mozafari B NRC (Affiliation Not Assigned) |
| To: | Hinnant C CAROLINA POWER & LIGHT CO. |
| References | |
| TAC-M94442, NUDOCS 9607100264 | |
| Download: ML14183A746 (3) | |
Text
AG UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 8, 1996 Mr. C. S. Hinnant, Vice President Carolina Power & Light Company H. B. Robinson Steam Electric Plant, Unit No. 2 3581 West Entrance Road Hartsville, South Carolina 29550
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE TECHNICAL SPECIFICATION CHANGE REQUEST TO RELOCATE THE CHEMICAL AND VOLUME CONTROL SYSTEM SURVEILLANCE REQUIREMENTS FOR THE H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 (TAC NO. M94442)
Dear Mr. Hinnant:
By letter dated November 27, 1995, you submitted a request for changes to the H. B. Robinson Steam Electric Plant, Unit No. 2 (HBR), Technical Specifications (TS) to revise TS section 3.2 to remove requirements for the chemical and volume control system (CVCS). The CVCS requirements would be relocated to a licensee-controlled document and controlled by the 10 CFR 50.59 evaluation process. The request to relocate the CVCS surveillance requirements to the Updated Final Safety Evaluation Report (UFSAR) is a major change that requires a risk-based review by the NRC staff. To complete our review, we have identified the need for additional information concerning the application of your plant's probabilistic risk assessment to the TS change.
The specific information needed is identified below.
- 1. Provide the results of Fussell-Vesely (FV) and Risk Achievement Worth (RAW) Importance analyses for the HBR CVCS.
- 2. Address the effects of the loss of one, two, and three CVCS pumps, and show the contribution of the CVCS system to the total core damage frequency (CDF) with and without the proposed relocation of the CVCS surveillance requirements from the TS to the FSAR. The response should include a discussion of the risk-informed configuration control management capability of the plant, and whether the CVCS pumps will be covered by the maintenance rule.
- 3. Provide an assessment of the change in the plant operational risk, including the change in CDF, core damage probability, and the large early release frequency as a result of the modified TS conditions.
- 4. Describe administrative controls established to ensure that adequate programs and procedures will be used to identify and compensate for risk-significant configurations resulting from maintenance and other operational activities when CVCS is unavailable.
10 014 2 9607100264 960708 F
r 7 rIf-rL PDR ADOCK 05000261 Lq P
Mr. Hinnant 2
Your written response to the RAI is expected within 30 days of the receipt of this letter. Should you have any questions, do not hesitate to contact me at (301) - 415-2020.
Sincerely, (Original Signed By)
Brenda Mozafari, Project Manager Project Directorate II-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No.
50-261 cc:
See next page Distribution 7Dgket1File PUBLIC PD II-1 RF S. Varga J. Zwolinski J. Flack N. Gilles C. Grimes OGC ACRS E. Merschoff, RH FILENAME -
G:\\ROBINSON\\ROB94442.RAI OFFICE LA:PDII-1 PM:P D:PDII-1 NAME Dunnidy tn BMoz'aari Elmbro DATE 7/.2/96
/2 96 7/ /96 COPY yNo Yes No Yes/&__
Mr. C. S. Hinnant H. B. Robinson Steam Electric Carolina Power & Light Company Plant, Unit No. 2 cc:
Mr. William D. Johnson Mr. Dayne H. Brown, Director Vice President and Senior Counsel 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 Ms. Karen E. Long Assistant 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 27626-0520 U.S. Nuclear Regulatory Commission Resident Inspector's Office Mr. Max Batavia, Chief H. B. Robinson Steam Electric Plant South Carolina Department of Health 2112 Old Camden Road Bureau of Radiological 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. J. Cowan Atlanta, Georgia 30323 Manager Nuclear Services and Environmental Mr. Dale E. Young Support Department Plant General Manager Carolina Power & Light Company Carolina Power & Light Company Post Office Box 1551 - Mail 0HS7 H. B. Robinson Steam Electric Plant Raleigh, North Carolina 27602 3581 West Entrance Road Hartsville, South Carolina 29550 Mr. Milton Shymlock U. S. Nuclear Regulatory Commission Public Service Commission 101 Marietta Street, N.W. Suite 2900 State of South Carolina Atlanta, Ga. 3023-0199 Post Office Drawer 11649 Columbia, South Carolina 29211 Mr. R. M. Krich Manager -
Regulatory Affairs Carolina Power & Light Company H. B. Robinson Steam Electric Plant, Unit No. 2 3581 West Entrance Road Hartsville, South Carolina 29550