ML20036A246
| ML20036A246 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 05/04/1993 |
| From: | Pellett J Office of Nuclear Reactor Regulation |
| To: | Tira Patterson OMAHA PUBLIC POWER DISTRICT |
| References | |
| TAC-M82979, NUDOCS 9305110003 | |
| Download: ML20036A246 (5) | |
Text
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NUCLEAR REGULATORY COMMISSION
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- i WASHINGTON, D. C. 20555 May 4, 1993 Docket No. 50-285 Mr. Terry L. Patterson Division Manager - Nuclear Operations Omaha Public Power District 444 South 16th Street Mall Mail Stop 8E/EP4 Omaha, Nebraska 68102-2247
Dear Mr. Patterson:
SUBJECT:
FORT CALHOUN STATION UNIT 1 - REQUEST FOR APPROVAL TO IMPLEMENT PROVISIONS OF ASME CODE CASE N-481 (TAC NO. M82979)
By letters dated March 6, and December 30, 1992, and February 12, 1993, and in telephone conversations between your office and the NRC on March 30 and March 31, 1993, you requested relief from performing the Reactor foolant Pump (RCP) casing volumetric weld examination and internal surface visual examination as specified in Table IWB-2500-1 of American-Society of. Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section XI, 1980-Edition Winter 1980 Addenda.
You proposed to implement provisions of ASME Code Case N-481, " Alternate Examination Requirement for Cast Austenitic Pump Casings",
which specifies three alternate examinations:
1.
VT-1 visual examination of the external surface of one RCP each 10-year inspection interval, 2.
VT-2 visual examination during the Reactor Coolant System Hydrostatic Test, and 3.
VT-3 visual examination of the RCP internals whenever a pump is disassembled for maintenance.
You stated that you agree with the conclusion of the letter from Combustion Engineering Owners Group (CE0G) to NRC "CEOG Submittal of CEN-412, Relaxation of Reactor Coolant Pump Casing Inspection Requirements" dated November 27, 1991 (CE0G-91-716), that the VT-1 visual examination would not be effective from a risk / benefit standpoint and you would therefore not perform VT-1. The NRC, as a matter of policy, does not grant reliefs from code cases since they are themselves, reliefs from the code requirements, and therefore denies your request not to perform VT-1 if you decide to follow Code Case N-481.
You also proposed to complete the VT-2 examination in conjunction with Code Case N-498, which allows a Reactor Coolant System (RCS) leak test instead of a RCS hydrostatic-test. The NRC allows the use of both code cases together as long_as the other provisions of Code Case N-481 are followea.
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' 'Mr. Terry L. Patterson i In summary, the NRC denies your request to implement only portions of Code Case N-481, and recommends that you either follow all the provisions of the code requirements or the Code Case N-481,Lwith the understanding that you can-combine it with Code Case N-498.
Sincerely, l
ORIGINAL SIGNED BY:
John Pellet, Acting Director Project Directorate IV-1 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation
,j cc:
See next page DISTRIBUTION:
Docket File NRC & Local PDRs
_PD4-1 Reading S. Bloom M. Virgilio.
-J. Pellet i
P. Noonan ACRS(10) (P-315)
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DATE A /2C 93 k/2///93 of/e3 /93 5/Y/93 7
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0FFICIAL RECORD COPY Document Name:
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Mr. Terry L. Patterson s In summary, the NRC denies your request to implemen't only portions of Code Case N-481, and recommends that you either follow all the provisions of the code requirerrents or the Code Case N-481, with the understanding that you can combine it with Code Case N-498.
Sincerely, lJohnPellet,ActingDirector.
Project Directorate IV-1 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation cc: See next page
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Mr. Terry L. Patterson-Omaha Public Power District Fort Calhoun Station, Unit No.- 1 cc:
Harry H. Voigt, Esg..
LeBoeuf,-Lamb, Leiby & Ma'cRae 1875 Connecticut Avenue, NW Washington, D.C.
20009-5728
' Mr.' Jack Jensen, Chairman-Washington County Board Di of, Supervisors Blair, Nebraska 68008 Mr. Raymond P. Mullikin, Resident Inspector i
U.S. Nuclear Regulatory Commission
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- Post Office Box 309 j
fort Calhoun, Nebraska 68023 j
Mr. Charles B. Brinkman, Manager
- Washington Nuclear-0perations
- Combustion Engineering, Inc.
1 12300 Twinbrook Parkway, Suite 330'
~f Rockville, MD: 20852-Regional Administrator, Region IV U.S. Nuclear Regulatory Commission
- 611 Ryan P1aza Drive, Suite 1000
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Arlington, Texas 76011 Harold Borchert, Director i
Division of Radiological Health Nebraska Department of Health 301 Centennial: Mall, South Post Office Box'95007 Lincoln,. Nebraska. 68509 Mr.-James'W. Chase, Manager Fort Calhoun Station.
Post Office Box.399 Fort Calhoun, Nebraska 68023 I
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Mr. Terry L. Patterson In summary, the NRC denies your request to implement only portions of Code Case N-481, and recommends that you either follow all the provisions of the code requirements or the Code Case N-481, with the understanding that you can combine it with Code Case N-498.
Sincerely, ORIGINAL SIGNED BY:
John Pellet, Acting Director Project Directorate IV-1
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Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation cc:
See next page
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DISTRIBUTION:
Doctetafile NRC & Local PDRs PD4-1 Reading S. Bloom M. Virgilio J. Pellet i
P. Noonan ACRS(10) (P-315)
OGC(15B18)
D. Smith, 7D4 A. B. Beach, RIV J. Roe G. Johnson OFC LA:PD4-hi(
PM;PD4-1 EMCB D:PD4-1 NAME PNoonan )U ddbm GJNson2 JPelletk DATE M /20 93 k/2///93 d e/e3 /93
$/Y/93
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COPY; iESINO
/bES/NO
[YEd/N0 YES/h v
0FFICIAL RECORD COPY Document Name:
FC82979.ltr i
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