ML17313A471
| ML17313A471 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Peach Bottom, Grand Gulf, Crane  |
| Issue date: | 11/03/2017 |
| From: | David Brown Lake Engineering Company |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML17313A471 (2) | |
Text
U S Nuclear Regulatory Commission Attn: Document Control Room Washington, DC 20555-0001 LAKE ENGINEERING CO.
P.O. Box296 1 O Austin Avenue Greenville, RI 02828 Tel: 401-949-4733 Fax: 401-949-0220 November 3, 2017
Subject:
Potentially Degraded Snubber SF1154 Hydraulic Fluid Batch 14ELVS145 Interim Report per 10 CFR Part 21 This letter reflects new information available since our previous interim notification dated July 24, 2017.
Peach Bottom We have concluded that a substantial safety hazard does not exist at this plant as a result of the subject fluid.
Grand Gulf We have concluded that a substantial safety hazard does not exist at this plant as a result of the subject fluid.
Three Mile Island We have concluded that a substantial safety hazard does not exist for 16of19 snubbers at this plant that were filled with the subject fluid and subsequently installed. Evaluation in this regard of the remaining three snubbers is scheduled for completion by November 21, 2017.
Millstone Evaluation of snubbers that were filled with the subject fluid and subsequently installed at Millstone is scheduled for completion by November 30, 2017.
The current status of the subject issue as it applies to US nuclear plants to which SF1154 fluid from Batch 14ELVS145 was shipped by Lake Engineering Company is summarized in the following table.
l U S Nuclear Regulatory Commission Potentially Degraded Snubber SF1154 Hydraulic Fluid Batch 14ELVS145 Interim Report per 10 CFR Part 21 November 3, 2017 Page2 Millstone Fluid used in some installed snubbers Evaluation scheduled for completion by November 30, 2017 Nine Mile Point Fluid not used Duane Arnold Fluid not used Monticello Fluid not used Pilgrim Fluid not used Three Mile Fluid used in some installed snubbers Island Grand Gulf Fluid used in some installed snubbers Peach Bottom Fluid used in some installed snubbers No substantial safety hazards No substantial safety hazards No substantial safety hazards No substantial safety hazards No substantial safety hazards exist for 16 of 19 snubbers with the subject fluid.
- Remaining snubbers to be evaluated by November21, 2017.
No substantial safety hazards No substantial safety hazards Our current goal is to submit our final evaluation report by December 7, 2017. If our evaluation is not complete at that time, an interim report shall be submitted on or before the above date and an updated evaluation completion date shall be provided.
If there are any questions or if additional information is required, please contact the writer by mail or by phone using the contact information provided above or by email at dbrown@lakeengineeringri.com.
Very truly yours, LAKE ENGINEERING COMPANY DPB/d/let110317.nrc cc: P. Guay - QA Mgr.