ML19331C859
| ML19331C859 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/27/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 8008190634 | |
| Download: ML19331C859 (1) | |
Text
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CENTRAL FILES a 0800g UNITED STATES PDR:HQ fo, NUCLEAR REGULATORY COMMISSION LPDR
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'i 611 RYAN PLA A IVE, SUITE 1000
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ARLINGTON, TEXAS 76012 NSIC M/
June 27, 1980 p
e Docket No. 50-267 Public Service Company of Colorado Al"IN:
Mr. C. K. Millen Senior Vice President P. O. Box 840 Denver, Colorado 80201 Gentlemen:
Enclosed is IE Bun atin No. 80-16 which requires action by you with regard to your power facility with an operating license or a construction permit.
Also enclosed is IE Circular 80-16 for information.
In order to assist the NRC in evaluating the value/ impact of each Bulletin on licensees, it would be helpful if you would provide an estimate of the manpower expended in conduct of the review and preparation of the report (s) required by the Bulletin.
Please estimate separately the manpower associated with corrective actions necessary fo nowing identification of problems through the Bulletin.
Should you have any questions regarding the Bu netin or Circular or the actions required of you, please contact this office.
Sincerely,
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w Kar'l 7. Seyfrit, l
Director
Enclosures:
1.
2.
IE Circular No. 80-16 3.
Lists of Recently Issued l
IE Bulletins and Circulars l
cc:
- 3. W. Warembourg, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Plattevine, Colorado 80651 800 819 0 [p[
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SSINS No.: 6820 Accession No.:
ifalau STATES 8005050066 NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFOR N T WASHINGTON, D.C.
20555 June 27, 1980 IE Bulletin No. 80-16 POTENTIAL MISAPPLICATION OF ROSEMOUNT INC. MODELS 1151 AND 1152 PRESSURE TRANSMITTERS WITH EITHER "A" OR "D" OUTPUT CODES Description of Circumstances The NRC has recently been advised through 10 CFR 21 reports that a potential misapplication problem exists on Rosemount Inc. Models 1151 and 1152 pressure transmitters with either "A" or "D" output codes.
The pressure transmitters are used in both pressure and differential pressure applications.
Applications include pressurizer pressure monitoring (pressure transmitters) and reactor vessel level monitoring (diffsrential pressure transmitters).
The potential misapplication problem occurs when the above specified transmitters are exposed to excessive over or reverse pressures.
These pressures can result in ambiguous signal outputs from the transmitter to control and/or indication components. These ambiguous signals could result in erroneous control action, such as an open signal to a solenoid valve rather than a closed signal, or an erroneous indication signal, such as an indication in the normal operating range when a pressure outside the normal range actually exists. contains Rosemount Inc.'s technical description of the potential application problems for Pressurt Transmitters Model 1152.
This information is applicable to Model 1151 Pressure Transmitters also. This information includes the reasons for the maloperation of the transmitters, a typical pressure versus current output curve and examples of the results of the mal-operations.
Available information indicates that the problem was reported to each customer who was furnished the subject transmitters by Rosemount Inc.
Actions to be Taken by Licensees of Power Reactor Operating Facilities and Holders of Construction Permits:
1.
Determine if your facility has installed or plans to install Rosemount Inc. Model 1151 or 1152 pressure transmitters with output codes "A" or "D" in any safety-related application.
2.
If it is determined that your facility has the transmitters described in I above in any safety-related applic:
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exposed to input pressures that coul[
during normal operation, anticipated DUPLICATE DOCUPINT If the affected transmitters can be <
j result in anomalous output signals, y Entire document previously determine whether the anomalous sign 2 entered into system under:
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