Part 21 Report - 1997-470
ACCESSION #: 9706120266
SIEMENS
June 9, 1997
HDC:97:051
Document Control Desk
ATTN: Chief, Planning, Program and Management Support Branch
U.S. Nuclear Regulatory Commission
Washington, D.C. 20555
Interim Report of Evaluation of a Deviation Pursuant to 10 CFR
21.21 (a)(2)
The following information is provided pursuant to the requirements of 10
CFR 21 to submit an interim report on issues that will not be completed
within 60 days of discovery.
An interim report is enclosed for the following issue under evaluation by
Siemens Power Corporation:
"Fraction of Power in Hot Rod for LBLOCA and SBLOCA Voided Core
Calculations"
If there are any questions regarding this issue, please contact Mr. Rich
Gottula at (509) 375-8221 or me.
Very truly yours,
H. Donald Curet, Manager
Product Licensing
/smg
Enclosure
cc: E. Y. Wang (NRR/DRPM/PECB)
Siemens Power Corporation
Nuclear Division 2101 Horn Rapids Road Tel: (509) 375-8100
Engineering &
Manufacturing P.O. Box 130 Fax: (509) 375-8402
Richland, WA 99352-0130
Interim Report
Subject:
Interim report of evaluation of a deviation pursuant to 10 CFR
21.21(a)(2)
Title:
Fraction of Power in Hot Rod for LBLOCA and SBLOCA Voided Core
Calculations
Identification of Basic Activity:
10 CFR 50.46 PWR ECCS Evaluation Model
Basic Activity Supplied By:
Siemens Power Corporation - Nuclear Division
Nature of Deviation:
The fraction of the power deposited in the hot rod under voided core
conditions may be non-conservative
Discovery Date:
April 21, 1997
Corrective Actions to Date:
Nonconformance report (NCR-6090) prepared and processed by management
review team as required by SPC-ND's Quality Assurance Manual, EMF-1.
Analyses have been performed which demonstrate that the fraction of power
deposited in UO sub 2 fuel rods under voided core conditions is
conservative, but the fraction of power deposited in gadolinia bearing
fuel rods may be non-conservative. Calculations for gadolinia bearing
fuel rods are in progress to verify 10 CFR 50.46(b) criteria are
satisfied. This issue is judged not to be a substantial safety hazard.
Evaluation Completion Schedule Date:
June 27, 1997
*** END OF DOCUMENT ***
Page Last Reviewed/Updated Wednesday, March 24, 2021