ML20077K725

Responds to NRC Bulletin 89-003, Potential Loss of Required Shutdown Margin During Refueling Operations. Outage & Operator Requalification Training Will Be Provided Prior to Refueling Operations

ML20077K725
Person / Time
Site:	Callaway
Issue date:	01/17/1990
From:	Schnell D UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-89-003, IEB-89-3, ULNRC-2140, NUDOCS 9108090070
Download: ML20077K725 (5)

Text

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N70N January 17, 1990 LECTRiC 33 U.S. Nuclear' Regulatory Commission.

Attn: Document Control Desk Mail Station F1-137 Washington D.C. 20555 Gentlemen:

ULNRC-2140 DOCKET NUMBER 50-483 CALLAWAY PLANT POTENTIAL LOSS _OF REQUIRED SHUTDOWN MARGIN DURING REFUELING OPERATIONS _,

Reference:

NRC Bulletin No. 89-03,-dated November 21,-1989.

This letter.provides_the requested response to

'NRC Bulletin No. 89-03, concerning potential loss of required shutdown margin during refueling operations.

1) Bulletin 89-03 requested that any inter -

L mediate fuel assembly configuration.to be L used-during refueling is identified ar.d evaluated to maintsin sufficient refueling boron concentration to result in a minimum shutdown margin of-approximately 5%.

Response: -Westinghouse has provided-guidelines which will assure that the required shutdown margin during-refueling-(Keff 1 95) is. maintained. These guide-

, lines are applicable for'a maximum enrichment limit _of 4.5 w/o U-235. This

. envelopes expected enrichmento at l Callaway.

b 2 )- Bulletin-89-03 requested that plants assure that fuel loading procedures'enly-allow those intermediate fuel. assembly L- configurations..that do not violate the allowable shutdown margin and that these procedures.are strictly adhered to.

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Response: The Westinghouse guidelines are incorporated into Callaway procedure ETP-ZZ-00035, Refueling Performance. This procedure currently requires that fuel assemblies stored temporarily be stored in the baffle at least 1 fuel assembly away from any other fuel assembly, and at least 2 fuel assemblies away from any cluster of fuel assemblies. The plant staff strictly adheres to this procedure.

3) Bulletin 89-03 requested that the staff responsible for refuelici operations is trained in the procedures recommended in Item 2 above and understand the potential consequences of violating these procedures. This training should include the fundamental aspects of criticality control with higher enriched fuel assemblies.

Response: Prior to refueling operations, the staff responsible for refueling is trained in refueling performance procedures through' courses: Outage Training (T68.1200.6) and Operator Requalification (T61.0810.8).

If there are any questions concerning this matter,.please contact me.

Very truly yours, h jf grFY v Donald F. Schnell JMC/dvd l'

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STATE OF MISSOU SS CITY OF ST. LOUIS 1 Donald F. Schnell, of lawful age, being first duly sworn upon oath says that he is Senior Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.

By NEA-Donald F. Schnell Senior Vice President Nuclear BED and sworn to before me this _ /7 day SUBSCN*W of 'A N *- , lS89. /77

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BARSMA PFAF NOTARY PUGUC. STATE OF MIS;0VR!

MY COMMISSION EXPIRES APRll 22, ;393 ST. LOUIS COUNN wn

cci Corald Charnoff, Esq.

Shaw, Pittman, Potts & Trowbridge 2300 N. Street, N.W.

Washington, D.C. 20037 Dr. J.-O. Cermak CFA. Inc.

4 Professional Drive (Suite 110)

Gaithersburg, MD 20879 R. C. Knop Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Bruce Little Callaway Resident Office

-U.S. Nuclear Regulatory Commission RR#1 Steedmam, Missouri 65077 D Tom Alexion (2)--

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 1 White Flint. North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20052 Manager, Electric Department Missouri Public Cervice Commission P.O. Bcx 360 Jefferson City, MO 65102

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/QA Record (CA-758)

Nuclear Date E210.01 DFS/ Chrono D. F. Schnell-J. E. Birk J. V. Laux M .- A . Stiller G. L. Randolph R. J. Irwin H. Wuertenbaecher W. R. Campbell A. C. Passwater

.R. P. Wendling D. E. Shafer D. J. Walker O. Maynard (WCNOC) ,

N. .P. Goel (Bechtel)

T. ?. Sharkey NSRB (Sandra Auston) l I'

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