ML19330B448
| ML19330B448 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 07/28/1980 |
| From: | Crane P PACIFIC GAS & ELECTRIC CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-80-16, NUDOCS 8008040032 | |
| Download: ML19330B448 (2) | |
Text
OPV PACIFIC GAS AND E LE C T RIC C O M PANY LAW DEPARTMENT - 77 B E A LE STR EET, 31ST FLOOR
- SAN FR A N CIS C O, C ALIFO R NI A 94106. (415) 781 4211 July 28, 1980 Mr. R. H. Engelken, Director Office of Inspection and Enforcement Region V U. S. Nuclear Regulatory Cotsnission 1990 N. California Boulevard W lnut Crsak Plaza, Suite 202 a
Walnut Creek, California 945%
Re Docket No. 50-133 License No. DPR-7
Dear Mr. Engelken:
This is in response to your letter dated June 27, 1980 which enclosed I.E. Bulletin No. 80-16 concerning the use of Rosemont pressure transmitters in safety-related systems.
The information requested is contained in Attachment A.
An estimated eight man-hours were expended in the review and preparation of this report.
Very truly yours, Philip A. Crane, Jr.
Attachment CC w/ attachment:
Office of Inspection and Enforcement Division of Reactor Operations Inspection U. S. Nuclear Regulatory Commission Washington, D. C. 20555 of
/
Document Management Branch /
3 U. S. Nuclear Regulatory Comission Washington, D. C. 20555 80080,o 0 3 g 4
h
n
- p ATTACHMENT A HUMBOLDT BAY POWER PLANT UNIT NO. 3 Response to Request for information Related to I. E. Bulletin No. 80-16 The subject bulletin requested each licensee to determine if Rosemont, Inc. Model 1151 or 1152 pressure transmitters with output codes "A" or "D" are used in any safety related application and, if so, to determine if their application is susceptible to the anomalous output signals described in Enclosure 1 to the subject bulletin.
There are two Rosemont, Inc. Model 1152 pressure transmitters in a safety related system at Humboldt Bay Power Plant Unit No. 3.
These pressure transmitters are used for reactor vessel coolant level sensing (differential pressure) and drywell pressure detection. In each case, the maximum possible input pressure to which these detectors can be exposed is less than the upper range limit for detection as defined in to I.E.Bulletin 80-16.
In neither case can reverse pressures exceed the upper range limit of detection. In conclusion, anomalous output signals from safety related Rosemont pressure transmitters during normal operation, anticipated transients or design basis accidents at Humboldt Bay Power Plant should not occur. Therefore, no corrective actions are required.
Approximately 8 man-hours were expended to conduct the review and prepa-ration of this report. Since the results of the review indicated that no actions were required, no man power was expended to perform corrective actions as a result of this bulletin.
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