ML20141H337

Provides Rod Drop Times & Associated Assembly Burnup Data for Tested Rodded Assemblies in Response to NRC Bulletin 96-001, Control Rod Insertion Problems

ML20141H337
Person / Time
Site:	Wolf Creek
Issue date:	07/14/1997
From:	Muench R WOLF CREEK NUCLEAR OPERATING CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ET-97-0073, ET-97-73, IEB-96-001, IEB-96-1, NUDOCS 9707220362
Download: ML20141H337 (2)

Text

_ __.. . . - .-. -

4

.- i W@) LF CREEKOPERATING NUCLEAR Richard A. Muench Vice President Engineering July 14, 1997 ET 97-0073 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station Pl-137

Washington, D. C. 20555

Reference:

Letter WO 96-0058, dated April 5, 1996, from O. L. Maynard,

WCNOC, to USNRC, " Response to NRC Bulletin 96-01, ' Control Rod Insertion Problems'"

Subject:

Docket No. 50-482: Control Rod Drop Test Data Gentlemen:

NRC Bulletin 96-01, " Control Rod Insertion Problems," requested licensees to measure and evaluate, at each outage of sufficient duration during calendar 1 year 1996, the control rod drop times and rod recoil data for all control rods. In the Reference WCNOC committed to testing control rods in fuel assembly locations having burnups greater than 25,000 MWD /MTU.

Wolf Creek Nuclear Operating Corporation did perform rod drop testing on May 21, 1997, during a forced outage, on all rodded assemblies with burnup near or

greater than 25,000 MWD /MTU. All rods exhibited recoil and none of the rod drop traces indicated any signs of excessive drag. Rod drop times and associated assembly burnup data for the tested rodded assemblies are provided in the attachment.

4 This information is being provided on a voluntary basis, and is not-an NRC Bulletin 96-01 required response.

If you have any questions concerning this response, please contact me at (316) 364-8831, extension 4034, or Mr. Richard D. Flannigan at extension 4500.

Very truly yours, S ulit^f Richa d A. Muench RAM /jad i

Attachment I f

cc: W. D. Johnson (NRC), w/a '/Nb ) '

E. W. Merschoff (NRC), w/a J. F. Ringwald (NRC), w/a J. C. Stone (NRC), w/a 9707220362 970714 lllbhbhllhlf PDR ADOCK 05000482 G PDR PO. Box 411/ Burhngton, KS 66839 / Phone: (316) 364-8831 An Equal Opportunity Employer M'F HCVET

_ _ . _ . . _ . . _ . . _ _ _ _ . . .._._ _ ._-. . .._ .-__ _ _ __ _ _ _ m_---.. . . . . _._ ._

+

Attachment to ET 97-0073 Page'1.of l'

, am -

Rod Drop Test and Assembly Burnup Data for the May 21,1997 Rod Drop Tests Assembly Rod Core Burnup Drop Time Rank Coordinates (MWD /MTU) (seconds)

CBD D4 34751 1.575 M12 34751- 1.579 D12 34751 1.583 M4 34751 1.597 H8' 29226 1.593 SBA D2 24499 1.573 B12 24499 1.568 M14 24499 1.59 P4 24499 1.593 B4 24484 1.579 D14 24484 1.612 P12 24484 1.609 M2 24484 1.596 SBE H4 34066 1.563 D8 34066 1.58 H12 34066 1.587 M8 34066 1.567