ML19078A087

Curtiss-Wright - Interim Notification Report for Potential Part 21 Update

ML19078A087
Person / Time
Site:	Quad Cities
Issue date:	03/08/2019
From:	Franchuk T Curtiss-Wright Nuclear Division
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML19078A087 (1)

Text

Nuclear Division 4600 East Tech Dr.

• Cincinnati, OH 45245 Phone: 513.528.7800

• Fax: 513.528.9292 www.CWNuctear.com March 8, 2019 U.S. Nuclear Regulatory Commission Attn: Document Control Desk 5"'/J- Z-5'/ /ZIPS Washington, D.C. 20555-0001

Subject:

Interim Notification Report for Potential Part 21 update.

Dear Sir or Madam:

In reference to the Curtiss-Wright Interim Notification Report dated 10/8/2018 (Event No.

ML18289A457/Log No. 2018-24-00) for an EA700-90964 limit switch failure, the following updates are provided.

Curtiss-Wright's investigation is ongoing, with the current focus being the evaluation of in-service switch operating temperatures and results from a recent disassembly/inspection of similar switches (same model but different date codes). Additional inspection of other switches currently in-service at the plant is needed to finish the investigation. Evaluation of these switches is expected to be completed by mid May. Once this data is made available, a final conclusion as to the root cause of the failme can be detennined.

We therefore request additional time to complete our evaluation and should have our final report issued by May 31, 2019.

Sin~~

Tim Franchuk Director, Quality Assurance Curtiss-Wright Nuclear Division, Cincinnati Operations 513-201-2176 TFranchuk@CurtissWright.com