ML20041B052

Forwards Response to SER Open Item 2,fuel Rod Pressure Limits,Confirmatory Item 4,cladding Collapse Analysis & Potential Condition of License,Fuel Burnup Limitation

ML20041B052
Person / Time
Site:	05000470
Issue date:	02/18/1982
From:	Scherer A ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
LD-82-018, LD-82-18, NUDOCS 8202230211
Download: ML20041B052 (2)

Text

-_ _ _ _ _ _ _ . _

C-E Power Systems Tel. 203/688-1911 Combustion Engineenng. Inc Telex 99297

[ 1000 Prospect Hill Road Windsor, Connecticut 06095 POWER SYSTEMS Docket No.: STN-50-470F Febr "-

1982

.h I?g NF ll Qg .$

Mr. Darrell G. Eisenhut, Director U\ %gE87 Z

'? %[k%f 84 12 Division of Licensing U. S. Nuclear Regulatory Commission V46?,%

Washington, D. C.

~

20555 s . a. \ f j

Subject:

CESSAR SER Open Item 2, Confirmatory Item 4, aridM} imitation

Dear Mr. Eisenhut:

The enclosure is transmitted for the Staff review of the CESSAR Final Safety Analysis Report. Transmitted in the enclosure is Combustion Engineering (C-E) input which is intended to close out the following open and confirmatory items identified in Section 1.7 and 1.8 of the CESSAR Safety Evaluation Report (SER):

1. Open item 2, Fuel Rod Pressure Limits

2. Confirmatory item 4, Cladding CQ lapse Analysis Also enclosed is a C-E response to Section 4.2 3 1 (h) of the CESSAR SER which is intended to renove the potential 20 GWd/t fuel burnup limit which the Staff was considering for a condition of CESSAR Applicant's operating license.

3 Potential Condition of License, Fuel Burnup Limitation If I can be of any additional assistance in this matter, please contact me or Mr. G. A. Davis of my staff at (203)688-1911, Extension 2803 Very truly ours,

n. cnerer

-- _w Director Nuclear Licensing

{ods AES:ctk

)[

Enclosure cc: C. I. Grimes 8202230211 820218 PDR E ADOCK 05000470 pyg

?

j Enclosure (1)

CESSAR FUEL PERFORMANCE ANALYSIS

References:

A. Letter A. E. Scherer to D. G. Eisenhut, dated October 8, 1981, LD-81-069, B. Letter A. E. Scherer to D. G. Eisenhut, dated January 11, 1982, LD-82-008.

1. FUEL ROD PRESSURE LIMITS (SER Section 4.2.1 (h)):

C-E maintains that no clad liftoff is the appropriate criteria for fbel rod pressure as discussed in Reference A. . However, C-E has completed a generic calculation for the CESSAR System 80 plants which verifies that C-E fbel rod internal gas pressure remains below the nominal system pressure during normal operation. The fuel rod pressure analysis used the fuel performance code FATES (CENPD-139-P-A) which has been approved by the Staff for licensing applications. The FATES code used also incorporated the burnup enhancement factor for calculationg fission gas release in accordance with NUREG-0418.

C-E maintains that no clad liftoff is the appropriate criteria for burnable poison rod pressure as' discussed in Reference A. However, C-E has com-pleted a generic calculation for the CESSAR System 80 plants which verifies that C-E burnable poison rod nternal gas pressure remains below the nominal system pressure during normal operation.

2. CLADDING COLLAPSE ANALYSIS (SER Section 4.2 3 2 (b)):

C-E has completed a generic calculation for the CESSAR System 80 plants which verifies that cladding collapse will not occur during the design lifetime of C-E fbel. C-E used the generic methods described in CENPD-187-A, which the NRC has approved for licensing applications.

3 FUEL BURNUP LIMITATION (SER Section 4.2 3 1 (h):

The approved fuel performance code FATES (CENPD-139-P-A) incorporating the burnup enhancement factor for fission gas release (in accordance with NUREG-0418) has been used in the CESSAR design and safety analyses. This includes the analyses addressed in Reference B.

i I

,,