ML040990246

Thermo Westronics Model 3000C and 3200C Series Recorders

ML040990246
Person / Time
Site:	Fermi
Issue date:	03/24/2004
From:	Nicholson B Thermo Electron Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML040990246 (3)

Text

Thermo ELECTRON CORPORATION THIS IS A IOCFR PART 21 NOTIFICATION Contacts: Barry Nicholson Director of Quality Assurance Barry Hutchison Manager- Services America- -

March 24, 2004 US Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Subject:

Thermo Westronics Model 3000C and 3200C Series Recorders This letter is notification of an event related to a Thermo Westronics Commercial Grade Series 3000 Recorder which was reported to Thermo Electron Corporation - Houston by Detroit Edison Fermi 2 Nuclear Power Plant on February 06, 2004. The Series 3000 is a multipoint programmable chart recorder utilized in both Commercial and Nuclear Safety Related applications both domestically and internationally.

The report indicated that, on January 28, 2004, a fire occurred within the Series 3000 Recorder used for training in the simulator at the Fermi 2 site. During the event, the CB100295-01 Printhead Transition Printed Circuit Board Assembly (PCBA) overheated and failed. Three other components within the immediate proximity were also damaged including the printhead flex cable, carriage transition PCBA, and printhead carriage drive belt.

On February 13, 2004, the damaged components were returned to Thermo so that a thorough failure analysis could be performed. A visual inspection determined that the CB100295-01 PCBA had sustained significant heat damage in and around the printhead driver circuit. The three other components including the PA100113-01 Printhead, CB100303-01 Carriage Transition PCBA and the RM100232-Cl Printhead Carriage Drive Belt also appeared to have varying levels of heat damage. Based on the report from Detroit Edison and the components returned for evaluation, it is believed that the damage was isolated to these components only.

Procme Istruments 9303W. San Houston Paxway S. Houston, TX (713) 272-0404 wwbe 77099-5204 (713) 2273 fax

Thermo hardware engineering personnel performed a failure analysis on the components and determined that the root cause of the failure occurred on the CB100295-01 PCBA when an internal clamp diode failed and shorted. This "failed short" condition is considered an abnormal failure but, in fact, could occur when several unfavorable conditions occur simultaneously. Further evaluation determined that the possibility for this type of failure only exists on the CB100295-01 PCBA design produced in 1990 through 1991, Revision A and Revision B configurations.

A review of records for Safety Related products from 1990 through 2004 was conducted to evaluate the potential impact. The CB100295C01 Safety Related version of this PCBA was used on both the Series 3000C and Series 3200C Recorders. There are no records indicating the reported failure of a Safety Related CB100295C01 in either a Series 3000C or Series 3200C from 1990 through 2004.

Ailthoiughi there have been no reported failuiriesinSafety Related applicatiois, Thermo has elected to recommend replacement of the Revision A and Revision B design of the CB100295C01 PCBA. This action is being taken to ensure that the potential for an event such as reported by Detroit Edison Fermi 2 should be eliminated. Therefore, Thermo shall offer a replacement printhead transition PCBA to nuclear utilities that have a CB100295C01 Revision A or Revision B installed or stocked as a spare part. The replacement PCBA shall be part number CB100460C01, Printhead Transition PCBA, which replaced the CB100295C01 in 1996.

The scope of this notification includes seven (7) CB100295C01 Printed Circuit Board Assemblies (Revision A and Revision B) installed in Safety Related recorders or sold as a Safety Related spare part from 1990 through 1991. The following is a list of the Safety Related recorders and spare parts that were sold in 1990 through 1991, including Serial Number, Ship Date, Customer, Location Shipped To, and Purchase Order.

Serial Number Ship Date Customer Shipped To Purchase Order

/ Part Number I I I 3000C1001 03/20/1991 Detroit Edison, 6400 Dixie Hwy NR-240614 3000CI_02 __ EF2 -Site Newport, MI __

300001002 03/20/1991 Detroit Edison, 6400 Dixie Hwy NR-240614 EF2 -Site Newport, MI CB100295C01 03/20/1991 Detroit Edison, 6400 Dixie Hwy NR-240614 Lot# BL90 EF2 -Site Newport, MI 3000C1003 09/25/1992 Consolidated Edison 534 Furnace Dock 290071-001 Rd. Peekskill, NY CB100295C01 06/11/1993 Detroit Edison, 6400 Dixie Hwy NM277906 Lot# 13600 EF2 -Site Newport, MI 3200C1001 07/03/1993 Comisi6n Federal Mexico 92-2-12660 de Electricidad 3200C1002 07/03/1993 Comisi6n Federal Mexico 92-2-12660

_ _ _ __ __ de Electricidad II Processt ndruentsb 9303 W. Sam Houston Parkway S. HoWtsn.TX (713) 272-0404 www.thermo.corn 77099-5204 (713) 272.2273 tax

Thermo shall notify the above listed customers and make arrangements to provide replacement CB100460COI Printhead Transition Printed Circuit Board Assemblies upon customer request. It is estimated that replacement should be completed within sixty (60) days, or as soon as Thermo has been contacted by the identified customers.

Should you have any questions regarding the above, please contact the undersigned.

Sincerely, Barry Nicholsm Director of SQawy Assurance cc: Larry Quick PrOMen hstiunents 9303 W.San Houston PAway S. Houston, TX (713)272-404 www. heno comn 77099-5204 (713) 272-2273 fax