2CAN049904, Informs That Based on Discussions with NRC Re 960823 Amend Request,Addl Info Was Added to TS 5.2.2 Re Control Element Assemblies (Ceas) Section of Proposed Change.Associated TS Page (5-1) Has Been Revised & Encl
| ML20205P362 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/09/1999 |
| From: | Hutchinson C ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20205P366 | List: |
| References | |
| 2CAN049904, 2CAN49904, TAC-M96480, NUDOCS 9904200151 | |
| Download: ML20205P362 (3) | |
Text
l e.
Entsrgy oper:tione,Inc.
-Entergy
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Tel501858 4888 C. Randy Hutchinson April 9,1999 ocan un 2CAN049904 U. S. Nuclear Regulatory Commission Document Control Desk Mail Station OPI-17 Washington, DC 20555
Subject:
Arkansas Nuclear One-Unit 2 Docket No. 50-368 License No. NPF-6 Request For Additional Information Concerning the Design Features Conversion Technical Specification Change Request (TAC # 96480)
Gentlemen:
By letter dated August 23,1996 (2CAN089609), Entergy Operations submitted a technical speci6 cation (TS) change request to convert the design features section of the Arkansas Nuclear One - Unit 2 (ANO-2) TSs to be consistent with NUREG-1432 Revision 1, of the improved " Standard Technical Specifications for Combustion Engineering Plants." Based on discussions with the NRC Staff regarding this amendment request, additional information was added to TS 5.2.2 regarding the control element assemblies (CEAs) section of the proposed change. The requested information is a description of the control material used in the ANO-2 CEAs.
The requested information was not included in the original submittal because the current j/
j ANO-2 TSs do not contain this level of descriptive information for the CEAs and the
/
requested information was already discussed in the ANO-2 safety analysis report. Sections 4.2.3.2.2 and 4.2.3.3.2.2 of the safety analysis report descri'ic the primary CEA control material as boron carbide in the form of cylindrical pellets. 'Yhis selection was based on the excellent neutron absorption capabilities of boron cantide end the proven acceptability of boron carbide for reactor control applications.
The secondary control material used in the CEAs is an alloy of silver-indium-cadmium. This material is used in the bottom portion of the CEAs and was selected based on its high neutron absorption cross section and its proven acceptability for reactivity control applications.
Moreover, this material has good dimensional stability under irradiation (less than 0.5 percent expansion) which contributes to the proper operation of the hydraulic buffer over the lifetime j
of the CEA by maintaining the proper diametrical clearance.
The associated TS page (5-1) has been revised and is attached to this letter. The attached f
change does not affect the conclusions of the no significant hazards determination of the August 23,1996, submittal.
9904200151 990409 l
PDR ADOCK 05000368 P
PDR _
1 U. S. NRC April 9,1999 2CAN049902 Page 2 1
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Very truly y s,
g'i l
CRII/rhs Attachments To the best of my knowledge and belief, the statements contained in this submittal are true.
SUBSCRIBED AND SWORN TO before me, a Notary Public in and for h
% ay of OEB
.1999.
County and the State of Arkansas, this 9 d
/
-0 :__
w 1
Andrea Pierce
" OFFICIAL SEAL"
' Notary P ic, State of Arkansas Notary Public My Commission Expires /cA //S,/Jod 7 L.My Commission Exp. }2/}5/2007j i
cc:
Mr. Ellis W. Merschoff Regional Administrator U. S. Nuclear Regulatoly Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310 London, AR 72847 Mr. Cluis Nolan NRR Project Manager RegionIV/ANO-2 U. S. Nuclear Regulatory Commission i
NRR Mail Stop 13-D-18 One White Flint North 11555 Rockville Pike l
Rockville, MD 20852 Mr. David D. Snellings Director, Division of Radiation Control and Emergency Management Arkansas Department ofHealth
(
4815 West Markham Street Little Rock, AR 72205 L.
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PROPOSED TECHNICAL SPECIFICATION PAGE 5-1 i