ML19331D332

Final Rept,Per 10CFR21 & IE Bulletin 80-16,re Rosemount Model 1152 Pressure Transmitter Safety Hazards.Twelve Transmitters Could Have False Instrument Outputs Caused by Overrange Condition.Instruments to Be Modified or Replaced

ML19331D332
Person / Time
Site:	Summer
Issue date:	08/25/1980
From:	Nichols T SOUTH CAROLINA ELECTRIC & GAS CO.
To:
References
IEB-80-16, NUDOCS 8009020031
Download: ML19331D332 (2)

Text

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SOUTH CAROLINA ELECTRIC a GAS COMPANY posf CFFICE SOA 764 COLUMalA. SOUTH CAROLINA 29218 g

- . i:MNicwoLs JR. - *

'v~d nceo m ..a caoo,,c>icuru August 25, 1980 ' -

(Nuclear Operations)

Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II, Suite 3100 101 Marietta Street, N. W.

Atlanta, Georgia 30303- , ,

Subject:

Virgil C. Summer Nuclear Station Docket No. 50/395 ISE Bulletin No. 80-16 dated 6/27/80 and Potential Substantial Safety Hazard or.

Rosemount Transmitters Nuclear Engineering Files 2.8950 & 3.1051

Dear Mr. O'Reilly:

Our letter to you dated 4/29/80 provided -au with an interim report on a potential substantial safety hazard cons caing Rosemount model 1152 pressure transmitters. Your letter dated 6/- '80 required action by us  ;

within sixty (60) days in response to IE Bul .cin 80-16 concerning the same transmitter problem.-

We have reviewed our safety related applications of Rosemount model 1152 pressure transmitters with output codes "A" or "D". We find that none can be exposed to input pressures that could result in ar.omalous output signals during normal operation, anticipated transien.a or de ign  !

basis accidents. We do not use Rosemount model 1151 transmitters 'a any I safety related applications.

We have also reviewed our non-safety related applicationr of Rosemount ,

model 1151 and 1152 pressure transmitters with output codes " s" or "D".

-We found that false' instrument outputs caused by an overrang: condition could result from nine (9) model 1152 and three (3) model l'.51 transmitters which are used to monitor flow in lines where a high flow c andition caused 4

by a pipe break or crack can be postulated. Even though p.tential erroneous indications or alarms from these instruments will not affe :t safe plant shut-down, we plan to modify or replace them to' prevent possible false outputs during high flow conditions.

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e Mr. James P. O'Reilly August 25, 1980 Page Two

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, This is the final report on this matter with regard to the reporting aspects of the substantial safety hazard (10CFR21) . Since the IEB required

a schedule for accomplishing corrective action and thtt schedule is not '

finalized at this time, this letter is an interim report with regard to the IEB. If you have any questions, please let us know.

Very truly yours, T. C. Nichols, Jr.

SMC:TCN:rh cc: H. T. Babb E. H. Crews, Jr.

D. A. Nauman V. C. Summer H. Radin M. B. Whitaker, Jr.

C. A. Price J. L."Skolds NPCF/Dixon File

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