2CAN069206, Requests Deferral of 911220 Application for Amend to License NPF-6,changing TS 3.4.2 Re Mode 4 Overpressure Protection Until NRC Approves Low Power Overprotection Spec

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Requests Deferral of 911220 Application for Amend to License NPF-6,changing TS 3.4.2 Re Mode 4 Overpressure Protection Until NRC Approves Low Power Overprotection Spec
ML20101L971
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 06/30/1992
From: James Fisicaro
ENTERGY OPERATIONS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
2CAN069206, 2CAN69206, NUDOCS 9207080007
Download: ML20101L971 (2)


Text

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S. Nuclear Regulatory Commission Document Control Desk Mail Station P1-137 Washington, DC. 20555

. Subj ect: ' Arkansas Nuclear One - Unit 2

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~ Docket No. 50-368 License No. NPF-6 Deferral' of Proposed Technical Specifications Change Request on.ANO-2 Mode 4 Overpressure Protection

/ Gentlemen In. letter dated December 20, 1991-(OCAN129103), Entergy Operations identified the need to modify Arkansas Nucleer One, Unit 2(ANO-2)

Technical' Specification 3.4.2. This specification currently references

-aligning the shutdown cooling system to ensure. adequate RCS overpressure

_protec_ tion in-Modes 4 and 5 when no code safety relief valves are considered operable. However, as noted. -th'e shutdown cooling system does not have sufficient relief capability to prevent an overpressure event

-under anticipated transient conditions. The proposed revision to Specification 3.4.2 would involve referencing the ANO-2 Low Temperature - ,

- Overpressure Protection (LTOP) system instead of the shutdown cooling

. system 'and would be limited to Mode 4. applicability sincu the ANO-2 LTOP valves will be enabled in Modes 5 and 6, if adequate alternate venting is not provided.

L .

_ The LTOP valves do not currently have a Technical Specificatlon E -requirement; .however, in accordance with Generic Letter 90-06 proposed

., . Technical Specifications-for the LTOP valves were submitted in letter dated June 18. 1991 (2CAN069107)- The proposed specifica*lon will l- _ require the L'IOP valves to be in service in Modes 5- and 6 (corresponding to-aLcold--leg temperature of 200 F or less) if the RCS is not ~

sufficiently vented. ..Upon NRC review and approval of the proposed LTOP

Technical Specification change, the ANO-2 SAR will-be updated to reflect the new LTOP setpoints. In addition, upon NRCl approval of_the LTOP L . specification change, the needed revision to Specification 3.4.2 to appropriately . reference the LTOP system and to coordinate actions with the_LTOP specification change can be performed.

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49207080007 920630 DR-ADOCK0500g8- pf

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June 30, 1992-

.Page 2 a  ;

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. 'Therefore, Entergyf0perations will defer proposal of the Techt.ical. f

.Specificatior. change to Section 3.4.2 until: the proposed LTOP

specification is approved _by.the NRC. As discussed in the December 20, ,

1991' letter, administrative controls have been established to ensure

-adequate overpressure protection in Mode 4 with inoperable pressurizer.

code safety valves.- This deferral has been discussed with Tom Alexion of NRR Projects.-

- Please contact. me if you require any additional information on this matter.

Very truly yours,-

% < ,MW James . Fisicaro Director, Licensing JJF/SAB/mmg.

cc: Mr. Robert Martin U. S. Nuclear Regulatory Commission Region IV--

'611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident' Inspector Arkansas Nuclear One1- ANO-1 & 2 Number 1, Nuclear Plant Road-Russellville',-AR 72801 Mr.1 Thomas W.-Alexion NRR' Project Manager, Region IV/ ANO-1 U. S. Nuclear Regulatory Commission.

NRR Mail Stop 13-H-3 One White Flint North 11555'Rockv111e Pike Rockville, Maryland 20852 Ms. Sheri Peterson-NRR Project Manager, Region IV/ANO-2 U. S._ Nuclear Regulatory Commission NRR Mail Stop 13-H-3

,. One White-Flint North 11555 Rockville Pike Rockville, Maryland 20852

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