ML19331C863
| ML19331C863 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/27/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | William Jones OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8008190637 | |
| Download: ML19331C863 (1) | |
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.,( pf June 27, 1980 Docket No.
50-285 Omaha Public Power District ATTN:
iJ. C. Jones, Division Manager -
Production Operations 1623 Harney Street Omaha, Nebraska 68102 Gentlemen:
Enclosed is IE Bulletin 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 esti:nate separately the manpower associated with corrective actions necessary following identification of problems through the Bulletin.
Should you have any questions regarding the Bulletin or Circular or the actions required of you, please contact this office.
Sincerely,
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Karl T. S frit Director
Enclosures:
1.
IE Circular No. 80-16 3.
Lists of Recently Issued IE Bulletins and Circulars cc:
S. C. Stevens, Manager Fort Calhoun Station
?ost Office Box 98 Fort Calhoun, Nebraska 68102 8008190fo37 g
SSINS No.: 6820 Accession No.:
UNITED STATES 8005050066 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT 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 (differential 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 Pressure 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 Reacter Operating Facilities and Holders of Construction Permits:
1 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.
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2.
If it is determined that your facility has the transmitters described in
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l exposed to input pressures that c i DUPLICATE DOCUMENT duringnormaloperation,anticipa,j Iftheaffectedtransmitterscan{l Entire document previously result in anomalous output signalf4 entered into system under:
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