ML20005E198
| ML20005E198 | |
| Person / Time | |
|---|---|
| Issue date: | 12/01/1989 |
| From: | Berlinger C Office of Nuclear Reactor Regulation |
| To: | Wanek S ROSEMOUNT, INC. |
| References | |
| REF-PT21-90 NUDOCS 9001040058 | |
| Download: ML20005E198 (2) | |
Text
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U" Mr. Stephen J._Wanek s.'
Vice President Operations Rosemount, Inc.
12001 Technology Drive Eden Prairie, MN 55344
Dear Mr. Wanek:
SUBJECT:
LOSS OF FILL-Olt IN TRANSMITTERS t1ANUFACTURED BY ROSEMOUNT During our discussions of October 24, Novenber 20, and Ncvember 21, 1989, we requested that Rosemount provide information on the susceptibflity of Model 1151 and 1152 transmitters to loss of fill-cil.
The primary purpose of this letter is to reiterate that request for information and to request additional information on loss of fill-oil in transmitters manufactured by Rosemount.
It is our understanding that failures of Model 1151 transmitters due to loss of fill-oil have been confirmed by Rosemount. Model 1151 transnitters, although supplied by Rosemount as commercial grade equipment, are utilized in safety-related systems in nuclear power plants.
A public meeting between Rosemount and the NRC has been scheduled for December 18, 1989 to discuss Rosemount's recommended surveillance and testing procedures to detect, prior to failure, Model 1153 and 1154 transmitters that are leaking fill-oil and to discuss the susceptibility of Model 1151 and 1152 transmitters to loss of fill-oil. We request that, prior to this meeting, Rosemount provide responses to the enclosed questions for Model 1151, 1152, 1153, and 1154 transmitters.
In accordance with NRC practice, a copy of this letter will be placed in the NRC's Public Document Room.
Sincerely, Orliinal Sl ned By i
Carl H. Bulingcr Carl H. Berlinger, Chief 90o1040058 891201 Generic Communications Branch PDR QA999 EMVROSM Division of Operational Events Assessment 99900271 PDC Office of Nuclear Reactor Regulation
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December 1, 1989 sV Enclosure 1)
Provide the model, range, and lot (weld) numbers, the date of manufacture, the date of return, and the date and amount of time in service for all Model 1151, 1152, 1153, and 1154 transmitters returned to Rosemount that may have exhibited symptoms indicative of loss of fill-oil. This should include transmitters returned to Rosemount in Eden Prairie, Minnesota, as well as Rosemount's-regional service centers (Los Angeles, California; Charlotte, North Carolina; Houston, Texas; Cleveland, Ohio; and Baton Rouge, Louisiana).
2)
Provide the model, range, and lot (weld) numbers and the date of confirma-tion for all Model 1151, 1152, 1153, and 1154 transmitters that Rosemount has confirmed have experienced a loss of fill-oil.
3)-
Providethestatusoftransmittersidentifiedin1)abovethathavenot been subjected to Rosemount's failure analysis.
4)
Provide the model, range, and lot (weld) numbers, the date of manufacture, and the date and amount of tine in service for all Model 1151, 1152, 1153, and 1154 transmitters that Rosemount is aware of in which symptoms indica-tive of loss of fill-oil are believed to have been seen; however, the transmitter cannot or has not been returned to Rosemount for failure analysis.
In addition, describe Rosemount's program to identify addition-al transmitters that may have shown symptoms indicative of loss of fill-oil.
5). Provide a listing of all customers, both domestic and international, that have purchased Model 1152, 1153 or 1154 transmitters, 6)
Provide information regarding the total number of Model 1151, 1152, 1153, and 1154 transmitters manufactured by Rosemount.
In addition, identify transmitters Rosemount considers not to be covered by Rosemount's 10 CFR Part 21 notification on loss of fill-oil.
7)
Provide a listing of all companies that Rosemount believes may have refurbished transmitters and then sold the refurbished transnitters, as well as a listing of customers that may have purchased these refurbished transmitters.
8)
Provide a listing of all manufacturers that have purchased Rosemount transmitters and components, including sensing modules, and also indicate whether these manufacturers have been informed of the loss of fill-oil issue.
I 9)
Describe actions taken by Rosemount and other nuclear industry representa-j, tives, prior to development of Model 1152, 1153 and 1154 transmitters, to qualify Model 1151 transmitters for service in nuclear power plants.
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- 10) Provide confirmation that the sensing module utilized in Model 1151, 1152, 1153, and 1154 transmitters is not utilized in other Rosemount transmitter models.
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