ML20213C791

Forwards First Round Questions Re Azimuthal Peaking Factor Determination,Mod of Process Computer Prog,Definition of post-irradiat Fuel Surveillance Prog

ML20213C791
Person / Time
Site:	Columbia
Issue date:	11/07/1978
From:	Kniel K Office of Nuclear Reactor Regulation
To:	Vassallo D, Vassalo D Office of Nuclear Reactor Regulation
References
CON-WNP-0230, CON-WNP-230 NUDOCS 7811170126
Download: ML20213C791 (2)

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DQcKET FilF NRR RDG FILE NOV 7 1978 CPB RDG FILE

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Docket Ho. 50-397 . . .

i 3 MEMORANDUM FOR: D. B. Vassallo, Assistant Director for Licht Water

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l Reactors. DPM ,

FROM:

K. Kniel, Chief. Core Perforinance Bra,nch, DSS , , ., ,

SUBJECT:

FIRST ROU:10 OUESTIONS FOR WPPSS., UNIT 2 i

i Plant Name: WPPSS-2 Docket Number: 50-397 Milestone Number: '05-24 Licensing Stage: OL Responsible Branch ~ LWR #4 and Project Manager: D. Lynch "

Systems Safety Branch Involved: Core Performance ~ Branch ~~

Description of Review: '

Requested Completion Date:

First Round Questions '

November B , 1978

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Review Status: Complete

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The Reactor Fuels and Reactor Physics Sections of the Core Perforuance i

Branch have prepared the enclosed~~~first round ' questions for the WPPSS.'~

i Unit 2 BWR. ~' ~ ~

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Karl Kniel, Chief Core Performance Branch Division of Systems Safety ,' _ ,

Enclosure:

i First Round Questions . . ..

I cc: S. Hanauer R. Mattson/F. Schroeder I

R. Boyd S. Yarga '

I D. Lynch R. Tedesco l R. Meyer D. Houston D. Fieno ' '

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QIVRlT l W. Brooks ,

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FIRST ROUND QUESTIONS - WPPSS-2 232. l Reactor Physics Section 4

232.1 (Table 4.3-5) Provide values of the azimuthal peaking factor and uncertainty used in this Table.

In what manner was the peaking factor determinedY 232.2 (p15.4-8) The RBM setting of 107% given here is inconsistent with the value given in Table 15.4-2. Please clarify.

232.3 (Table 15.4-12) Is the average enrichment in this Table (2.33) correct or should it be 2.23 as in NE00-20944?

232.4 Comment on the manner in which the process computer program is mbdified to eccommodate the 150-inch fuel length. Has the TIF travel been increased to cover the extended fuel? Are there still 24 nodes (of slightly gredter ifngth) or has an additional nodp been included? In what manner are the core averaged and peak heat generation rates defihed?

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