ML20153B303
| ML20153B303 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/30/1988 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Wilgus W FLORIDA POWER CORP. |
| Shared Package | |
| ML20153B309 | List: |
| References | |
| TAC-59085, NUDOCS 8807130034 | |
| Download: ML20153B303 (3) | |
Text
.
.m j June 30, 1988 i
Docket No. 50-302 DISTRIBUTION AThadani, 7/E/4 EDonetirneA HS11ver g
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EJordan,3302 HNBB Mr. W. S. Wilgus SVarga, 14/E/4 BGrimes, 9/A/2-Vice President, Nuclear Operations Glainas, 14/H/3 ACRS(10)
Florida Power Corporation HBerkow Gray File ATTN: Manager, Nuclear Licensing DHiller P. 0. Box 219
- Crystal River, Florida 32629
Dear Mr. Wilgus:
SUBJECT:
NRC EVALUATION OF BWOG GENERIC REPORT "DESIGN REQUIREMENTS FOR DSS AND AMSAC".AND ATWS IMPLEMENTATION AT CRYSTAL RIVER UNIT 3-(CR-3) (TAC N0. 59085)
The purpose of this letter is to provide the staff's evaluation of B&W Document 47-1159091-00, "Design Requirements for Diverse Scram System (DSS) and ATWS Hitigation System Actuation Circuitry (ANSAC)," prepared by Babcock & Wilcox for the Babcock & Wilcox Owners Group (BWOG) ATWS Committee.
This BWOG generic report was submitted by letter dated October 9,1985 (from J. Ted Enos, Choirman, BWOG ATWS Committee to Hugh L. Thompson, NRC) pursuant to requirements specified in the Code of Federal Regulations (CFR), Section 10 CFR 50.62, "Requirements for Reduction of Risk from ATWS Events for Light-Water-Cooled Nuclear Power Plants."
The BF ' Jeneric report provides the generic design basis for ATWS modifications of B&t,-type nuclear power plants required by 10 CFR 50.62.
Subsequent to the generic report submittal, the staff met with members of the BWOG ATWS Standing Connittee on_ October 28, 1987 to discuss potential open items which were raised during the staff review of the generic report.
Following this meeting, the BWOG s
submitted another set of responses to the remaining open items by letter dated December 1,1987 from J. Ted Enos (BWOG) to Frank J. Miraglia (NRC).
Based on our review of the information provided in the BWOG generic report and the supplemental letter of December 1, 1987, the staff concludes that_most sections of the generic report are acceptable for providing generic guidelines t
for plant-specific design submittals.
However, some areas of the generic design are still of concern to the staff. Therefore, the staff has presented several design requirements in the enclosed Safety Evaluation Report (SER) which should be followed by the utilities when considering their plant-specific DSS and AMSAC i
designs.
Following ore the areas of concern that plant-specific submittals must address.
j l
The BWOG generic report is not acceptable when addressing the use of i
power supplies for DSS and ANSAC.
In this regard, the staff suggests-that special attention be given to the accejtable methods ~ as ' presented in Section 5.6 of the SER.
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a Mr. W. S. Wilgus June 30, 1988 The use of qualified isolation devices should be addressed in detail in the plant-specific submittals.
Whether diverse or existing isolators are used, the staff suggests that the utilities use Sections 5.1 and 5.2 of the SER for guidance when addressing this issue in their submittals.
The plint-specific submittals n.ust provide detailed information which describes how a total loss of feedwater flow will be detected and why the measurements chosen are indicative of a total loss of feedwater flow. Section 6.5 of the SER provides additional guidance ti.at the plant-specific submittal should consider when addressing the input pardmeters which have been chosen to initiate DSS and/or AMSAC.
Other areas of concern to the staff include:
(1) bypasses and displays, and (2) surveillance and testing.
Specific guidance for plant-specific submittals ore presented in Sections 5.9 through 5.12 and 5.14 for "Bypasses and Displays" and Section 6.4 for "Surveillence and Testing" of the SER.
Design details such as physical and operational characteristics of those DLS and ANSAC components which are not addressed in either the BWOG generic report or the plant-specific submittals and which may influence the staff's conciusions concerning compliance to requirements of the ATWS 50.62 "rule" will be reviewed and inspected on o plant-sifcific basis.
You should proceed immediately with your efforts on ATWS implementation at Crystal River Unit 3 to conform with the requiran.ents of the SER, of 10 CFR 50.62, and of our letter dated March 11, 1987. We request that within 90 days of the date of this letter you address the design requiren.cnts discussed above and in the SER.
However, delay in proceeding with implementation efforts pending any further discussion of these requirements or review by NRC will not be considered acequate justificotion for delaying ATWS implementation beyond the third refueling after July 24,1984.
The reporting and/er recordkeeping requirements contained in this letter affect fewer than 10 respondents; therefore OMB clearance is not required under P.L.96-511.
Shculd you have any questions concerning the matters discussed above or the content of the enclosed SER, please contact Vincent Thomas of our staff on (301) 492-0786, or your Project Manager.
Sincerely, Original signed by Steven A. Varga, Director Division of Redctor Projects-I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
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F Mr. W. S. Wilgus Crystal River Unit No. 3 Nuclear Florida Power Corporation Generating Plant CC:
Mr. R. W. Neiser State Planning and Development Senior Vice President Clearinghouse and General Counsel Office of Planning and Budget Florida Power Corporation Executive Office of the Governor P. O. Box 14042 The Capitol Building St. Petersburg, Florida 33733 Tallahassee, Florida 32301 Mr. P. F. McKee Mr. F. Alex Griffin, Chairman Director, Nuclear Plant Operations Board of County Comissioners Florida Power Corporation Citrus County P. O. Box 219 110 North Apopka Avenue Crystal River, Florida 32629 Inierness, Florida 36250 Mr. Robert B. Borsun Mr. E. C. Simpson Babcock & Wilcox Director, Nuclear Site Nuclear Power Generation Division Florida Power Corporation Support 1700 Rockville Pike, Suite 525 P.O. Box 219 Rockville, Maryland 20852 Crystal River, Florida 32629 Resident Inspector U.S. Nuclear Regulatory Comission 15760 West Powerline Street Crystal River, Floried 32629 Regional Administrator, Region II U.S. Nuclear Regulatory Comission 101 Marietta Street N.W., Suite 3100 Atlanta, Georgia 30323 Jacob Daniel Nash Office of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.
Tallahassee, Florida 32399-0700 Aoministrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahossee, Florica 32301 Attorney General Deportnent of Legal Affairs The Capitol Tallahassee, Florida 32304