ML052030046

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Draft Request for Additional Information
ML052030046
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 07/22/2005
From: Richard Ennis
NRC/NRR/DLPM/LPD1
To: Darrell Roberts
NRC/NRR/DLPM/LPD1
Ennis R, NRR/DLPM, 415-1420
References
TAC MC4603
Download: ML052030046 (4)


Text

July 22, 2005 MEMORANDUM TO: Darrell J. Roberts, Chief, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Richard B. Ennis, Senior Project Manager, Section 2 /RA/

Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation

SUBJECT:

VERMONT YANKEE NUCLEAR POWER STATION, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC4603)

The attached draft request for information (RAI) was transmitted on July 21, 2005, to Ms. Ronda Daflucas of Entergy (the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensees amendment request for Vermont Yankee Nuclear Power Station dated October 6, 2004, as supplemented on February 16, 2005.

The proposed amendment would revise Technical Specification surveillance requirement 4.5.B.1 related to air testing of the drywell spray headers and nozzles. Specifically, the amendment would change the test frequency from once every five years to following maintenance that could result in nozzle blockage.

This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensee's request.

Docket No. 50-271

Attachment:

Draft RAI

July 22, 2005 MEMORANDUM TO: Darrell J. Roberts, Chief, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Richard B. Ennis, Senior Project Manager, Section 2 /RA/

Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation

SUBJECT:

VERMONT YANKEE NUCLEAR POWER STATION, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC4603)

The attached draft request for information (RAI) was transmitted on July 21, 2005, to Ms. Ronda Daflucas of Entergy (the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensees amendment request for Vermont Yankee Nuclear Power Station dated October 6, 2004, as supplemented on February 16, 2005.

The proposed amendment would revise Technical Specification surveillance requirement 4.5.B.1 related to air testing of the drywell spray headers and nozzles. Specifically, the amendment would change the test frequency from once every five years to following maintenance that could result in nozzle blockage.

Docket No. 50-271

Attachment:

Draft RAI DISTRIBUTION PUBLIC DRoberts RGoel CHarbuck PDI-2 Reading REnnis RDennig VBucci, OIG ACCESSION NO.: ML052030046 OFFICE PDI-2/PM NAME REnnis DATE 7/21/05 OFFICIAL RECORD COPY

DRAFT REQUEST FOR ADDITIONAL INFORMATION DRYWELL SPRAY HEADER NOZZLE AIR TEST FREQUENCY AMENDMENT REQUEST VERMONT YANKEE NUCLEAR POWER STATION DOCKET NO. 50-271 By letter dated October 6, 2004, as supplemented on February 16, 2005, Entergy Nuclear Vermont Yankee, LLC and Entergy Nuclear Operations, Inc. (Entergy or the licensee) submitted an amendment request for Vermont Yankee Nuclear Power Station (VYNPS). The proposed amendment would revise Technical Specification surveillance requirement 4.5.B.1 related to air testing of the drywell spray headers and nozzles. Specifically, the amendment would change the test frequency from once every five years to following maintenance that could result in nozzle blockage.

The Nuclear Regulatory Commission (NRC) staff has reviewed the information the licensee provided that supports the proposed amendment and would like to discuss the following issues to clarify the submittal:

1. Entergys application dated October 6, 2004, states that surveillance records, dating from 1986 to present, identified only one instance (April 1995) of blockage of three individual drywell spray caps at VYNPS. Please indicate the reasons for the blockage found such as corrosion or foreign particles. Indicate procedural controls implemented to ensure headers and spray nozzles remain free of flow-obstructing material.
2. Please indicate the material of the spray headers and why spray and header pipes are not expected to rust significantly to cause blockage of the spray system.
3. Please discuss how the foreign material exclusion program is implemented to preclude the introduction of foreign materials into system or components during maintenance, modifications or testing activities.