ML023050180

Attachment 14, Entergy Actions for TMI Tube Sever Concerns for ANO-1

ML023050180
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/30/2002
From:	Sharon Bennett Entergy Operations
To:	Alexion T Office of Nuclear Reactor Regulation
Shared Package
ML023050214	List: 2CAN090203, Attachment 10, Arkansas Nuclear One, Unit 2, Draft, Supplement to Amendment Request for TS Change Regarding Missed Surveillances Using the Consolidated Line Item Improvement Process ML023050102 ML023050106 ML023050107 ML023050110 ML023050112 ML023050119 ML023050123 ML023050127 ML023050134 ML023050169 ML023050176 ML023050180 ML023050184 ML023050189 ML023050192 ML023050200 ML023050208 ML023100131
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Download: ML023050180 (3)

Text

i-'acie 1 iý'mas Alexion-ANO-1 Thomas Actions for TMI SG Tube Sever Conce rn Alexion - ANO-1 Actions for TMI SG Tube Sever Concern Paae 1 From: "BENNETT, STEVE A" <SBENNE2@entergy.com>

To: "T'om Alexion'" <twa@nrc.gov>

Date: 9/30/02 10:14AM

Subject:

ANO-1 Actions for TMI SG Tube Sever Concern Tom, See attached notes for Call tomorrow Attachment 14

Entergy Actions for TMI Tube Sever Concerns for ANO-1 ANO-1 Scope of Potential Concern

"* ANO-1 did not install Westinghouse or B &W 1-600 mechanical rolled plugs during the 1980's. Instead, ANO-1 used either welded, ribbed or explosive plugs

"* The first rolled plug was installed in the ANO-1 OTSG's in 1992 which was Alloy-690 material.

"* Review of past outage eddy current data revealed no wear indications have ever been detected at the tubesheet face

"* ANO worked with Framatome, based on the criteria presented at the Feb. 1.

2002 meeting with the NRC, to determine the susceptible plugged tube list

"* List included:

UTS plugs removed and replaced at a later date, UTS plugs installed could have leaked and another type of plug was placed in the tube to seal the water in the tube, 1-690 plugs installed was rerolled/retorqued at a later date to possibly seal in water

"* A total of 12 tubes were determined to be susceptible to possible tube swelling Entergy Planned Actions During 1R17 Outage

"* ANO has no plans to remove any plugs during 1R1 7

" All susceptible tubes have been evaluated and a total of 63 neighboring tubes will be plugged. 4 stabilizers will be installed in the upper span due to the industry operating experience events

"* Some tubes will be plugged as an extra "buffer zone" downstream of plugged tubes

"* Eddy Current Analysis will be performed on all tubes surrounding susceptible tubes to ensure no wear is seen on tubes prior to plugging/stabilizing

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Subject:

ANO-1 Actions for TMI SG Tube Sever Concern Creation Date: 9/30/02 9:27AM From: "BENNETT, STEVE A" <SBENNE2@entergy.com>

Created By: SBENNE2@enterev.com Recipients nrc.gov owf4_po.OWFNDO TWA (Thomas Alexion)

Post Office Route owf4_po.OWFNDO nrc.gov Files Size Date & Time MESSAGE 45 09/30/02 09:27AM TMI Tube Sever Notes.doc 20480 Mime.822 29508 Options Expiration Date: None Priority: Standard Reply Requested: No Return Notification: None Concealed

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