ML20029D874
| ML20029D874 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 04/29/1994 |
| From: | Richard Anderson NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-90-001, IEB-90-1, NUDOCS 9405110300 | |
| Download: ML20029D874 (2) | |
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4 Northem States Power Company 414 Mcollet Mall Minneapolis, Minnesota 55401 1927 Telephone (612) 330-5500 April 29, 1994 NRC Bulletin No. 90-01 Supplement 1 i
i U S Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555 l
MONTICELLO NUCLEAR CENERATINC PLANT Docket No. 50-263 License No. DPR-22 Additional Information Related to Response to NRC Bulletin No. 90 01, Supplement 1 Loss of Fill-oil in Transmitters Manufactured by Rosemount j
i on March 1,1993, we responded to NRC Bulletin No. 90 01, Supplement 1, Loss of Fill-oil in Transmitters Manufactured by Rosemount. On March 24, 1994 additional information was requested by Beth Wetzel (of the NRC Staff) regarding our i
response. This letter documents the additional information requested by the NRC Staff.
In our response to Items i.e. and 1.f. of the Bulletin, we had stated that: "We j
recognize the need to detect potential failures due to loss of fill-oil and maintain functional rollability.
We feel we have taken appropriate actions to maintain a high degree of confidence in these transmitters," The NRC staff has requested that we clarify what " appropriate actions" have been taken and are being taken to maintain a high degree of confidence in the ability to detect failures due to loss of fill oil.
In response to the above question, the following information is provide :
Training has been provided to Operations personnel regarding the indicators of loss of fill-oil during the monitoring of these instruments.
- Training has been provided to the Instrument and Control technicians which included a review of the Rosemount technical manual updated with the NRC Bulletin information and class room training on detection of the problem.
- Criteria for evaluating tranmitter abnormalities has been included in surveillance procedure 0000-E, Operations Daily Log - Part E, which is performed by Operations personnel, The criteria identifies instrument readings which may be indicative of a failing or failed transmitter and that upon noticing such behavior that it is to be logged for attention by the engineering staff.
- The work instructions provided to the Instrument and Control technicians establishes characteristics to be evaluated for the Rosemount 1153 Series B 9405110300 940429
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a transmitters and the evaluation criteria for those characteristics; the instructions also require that the documentation for each cellbration of a Rotemount Differential Pressure Transmitter be reviewed by an Instrument Engineer.
We have made no new NRC commitments in this letter.
Please contact Marv Engen (612-295-1291) if you have any questions related to this letter.
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kor Roger 0 Anderson Director I.icensing and Management I s s u e r.,
c: Regional Administrator - Region III, NRC
':enior Resident Inspector, NRC NRR Project Manager, NRC J E Silberg e
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