ML20148A867
| ML20148A867 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 03/11/1988 |
| From: | Silver H Office of Nuclear Reactor Regulation |
| To: | Wilgus W FLORIDA POWER CORP. |
| References | |
| NUDOCS 8803210205 | |
| Download: ML20148A867 (3) | |
Text
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Merch 11. 1938 Docket No. 50-302 Wr. W. S. Wilgus Vice President, Nuclear Operations Florida Power Corporation ATTN: Manager, Nuclear Licensing P. O. Box 219 Crystal River, Florida 3?629
Dear Mr. Wilgus:
SUBJECT:
FEBRUARY 2A, 1988 EVENT AT CRYSTAL RIVER UNIT 3 Because the subject transient occurred so close to the completion of the R&W Reassessment, ve believe it is important that we fully understand the event, plant design, and plant operations as they could reflect on the reassessment ennelusions.
In order to assist us in reaching such understanding in a timely manner, we would appreciate your providing answers to the following questions by March 25, 1988, either in writing or at a meeting at White Flint.
1.
Explain ICS control of NFW between 0% and 100% power. Specifically.
(a) MFW pump speed control vs. MFWS valve delta P control vs. OTSG 1evel control of MFW flows (b) when the different MFWS flow paths are used; (c) typical transfer points between flow paths and control modes; and (d) the interlock between the MFW block valves and cross-tie valves, and its basis.
P.
Is turbine trip on rea: tor trip safety related? Why/Why not?
3.
Would installation of diverse turbine trip circuitry required by the ATWS Rule (10 CFR 50.62) have provided turbine trip given failure of trip solenoid?
4.
Is the existing MFW flow control scheme, including flev raths, the original installed design? If not, describe the original design and the reason (sP for the design change.
5.
Provide P&lDs for the main feedwater system and ICS system schematics.
6.
During the event, autotatic trip of the turbire on reactor trio did not occur. Discuss how the plant would have responded if the operator had not taken prompt action to effectively isolate this turbine.
8803210205 080311 DR ADOCK 0500 2
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Pr. W. S. Wilgus Crystal Piver Unit No. 3 Nuclear Florida Power Corporation Generating Plant cc:
Mr. R. W. Neiser State Planning and Development Senior Vice President Clearinghou's 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 Commissioners Florida Power Corporation Citrus County P. O. Box P19 110 North Apopka Avenue Crystal River, Florida 37629 Inverness, Florida 36250 Mr. Robert B. Borsum 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 Commission 15760 West Powerline Street Crystal River, Florida 32629 Recional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite E900 Atlanta, Georgia 30323 Jacob Daniel Nash Office of Padiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.
Tallahassee, Florida 32399-0700 Administrator Department of Enytronmental Regulation Power Plant Siting Section l
State of Florida i
7600 Blair Stone Road Tallahassee, Florida 3?301 Attorney General Department of Legal Affairs The Capitol i
l Tallahastee, Florida 32304 l
l t
Mr. W. S. Wilgus
-?-
i 7.
How would this transient be categorized using the SPIP designations?
f 8.
What if any, SPIP recommendations would have prevented, or mitigated.
l the event? Are there any SPIP recomendations which could have had an
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adverse effect on the transient.
Please contact me if you have any questions regarding this request, and to arrange a meeting if you prefer to respond in that manner.
j Sincerely, i
i Original signed by i
Harlev Silver, Project Manager Project Directorate II-?.
Division of Reactor Projects-I/II Office of Nuclear Peactor Regulation L
cc:
T. Martin L. Shao i
G. Lainas t
R. Jones i
S. Newberry l
R. Kendall See next page F
DISTRIBUTION i
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H. Silver l
NRC & Local PDRs OGC-WF
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PDPP Reading E. Jordan S. Varga J. Partlow G. Lainas ACRS (10)
D. Miller Gray File i
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