ML17317B172
| ML17317B172 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 05/04/1979 |
| From: | Maloney G INDIANA MICHIGAN POWER CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:00142, AEP:NRC:142, NUDOCS 7905110183 | |
| Download: ML17317B172 (4) | |
Text
REGULATORY INFORMATION DISTRIBUTION'YSTEM (RIOS)
ACCESSION NBR:7905110183 OOC ~ DATE: 79/05/04 NOTARIZED:
YES DOCKET FAG IL 50 315 DONALD C ~
COOK NUCLEAR POWER PLANT F UNIT 1 e INDIANA 5 0'500 50 316 DONALD C
COOK NUCLEAR -POWER PLANTS UNIT 2 INDIANA 8 050 316 AUTH'AME AUTHOR AFFILIATION MALONEYe G ~ P ~
INDIANA 5 MICHiGAN. POWER CO ~
RECIP ~ NAME RECIPIENT AFFILIATION DENTONF H ~ R ~
OFF ICE OF NUCLEAR REACTOR REGULATION
SUBJECT:
ADVISES OF REMOVAL OF FOXBORO TRANSMITTERS ON PRESSURIZER PRESSURE STEAM GENERATOR STEAM FLOW APPLICATIONS AS IDENTIFIED IN 780601
~ TRANSMITTERS WILL BE REPLACED
- DURING, CURRENT REFUELING OUTAGE 5
NO LATER THAN OCT NOV 1979
'ISTRIBUTION CODE:
AOOIS COPIES RECEIVED:LTR i ENCL g SIZE:~
TITLE: 'GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LIC BCL~8 RECIPIENT ID CODE/NAME ACTION:
05 BC 088 ~ /
INTERNAL: 01 12 ISE 15 CORE PERF BR 17 ENGR BR 19 PLANT SYS BR 21 EFLT TRT SYS EXTERNAL: 03 LPDR 23 ACRS COPIES LTTR ENCL 1-2 1
1 1
1 1,
1 1
1 1
16 1
RECIPIENT IO CODE/NAME 02 NRC PDR 14 Ta/EDO 16 AD SYS/PROJ 18 REAC SFTY BR 20 EEB 22 BR INKMAN 00 NSIC COP IES LTTR ENCL 0
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 38 ENCL
INDIANA II MICHIGAN POWER COMPANY P. O. BOX 18 80 WLI N G G R E EN STATION NEW YORK, N. Y. 10004 May 4, 1979 AEP:NRC:00142 Donald C.
Cook Nuclear Plant Units 1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 Replacement of Safety Related Transmitters Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Denton:
Please be advised that we will remove the Foxboro Transmitters on the pressurizer pressure and steam generator steam flow applications, identified in Transmittal No. AEP:NRC:00021 dated June 1, 1978.
We will replace these transmitters during the current refueling outage on Unit 1, and no later than the next refueling outage currently contem-plated for October-November 1979 on Unit 2.
For this replacement we have selected Barton Model 763 and 764 electronic transmitters.
The replacement of the Foxboro transmitters with Barton Transmitters rather than the Rosemount's discussed in our transmittal letter of June 1, 1978, is based on the fact that the Barton transmitter output signal is 10-50 ma, therefore, circuit changes would not be required; that the Barton transmitters used for steam generator level, pressurizer
- level, and reactor coolant pressure were qualified for post accident monitoring and were in-stalled on Unit 2 prior to start-up, and will be installed'on Unit 1 during the current refueling outage and that by purchasing the Barton transmitters through Westinghouse Electric Corporation we are further assured that the acceptance criteria for output signal accuracy fully conforms to the Westing-house Accident Analysis.
In addition, the use of Barton transmitters would not require the preparation and use of additional maintenance and surveillance specifications.
Also, their use would reduce stocking of another manufacturer's spare parts.
Mr. Harold R. Denton, Director w2 i
AEP:NRC:00142 All of the Barton transmitters which will be installed in Unit No.
1 have been received from Barton production Lot No.
2 with the exception of the Pressurizer Pressure Transmitters which were produced as part of Lot No. l.
The differences between Lot No.
1 and Lot No.
2 transmitters are out-lined below:
(1)
The Motorola amplifier used in the manufacture of the Barton Lot No.
1 transmitters was not available for Lot No. 2.
Following notification, by Motorola, that their amplifier was to be discontinued, Barton initiated a search, before Lot No.
2 production began, for an alternative vendor.
Barton also conducted an extensive testing program, which lasted for many months, to qualify the component used in the production of Lot No.
2 transmitters.
(2)
The selected replacement radiation-hardened amplifier is manufactured by the Semi-Conductor Division of the Harris Corporation.
The difference in size and shape of the component, compared to the original Motorola device, required a modified board layout and spacing.
(3)
Chemical composition changes have been implemented in the circuit board for improved temperature rating, and terminals with PVC jacketing have been changed to bare terminals to eliminate any possibility of chlorine gas formation.
Changes implemented in the Lot No.
2 transmitters are limited to modi-fications in the unit electronics.
The sensing unit, casing, sealing mechanisms',
etc.
remain unchanged.
Preliminary tests by Barton have indi-cated that the modifications, thus introduced, do not compromise the per-formance capabilities demonstrated for the Lot No.
1 transmitters.
The Lot No.
2 transmitters will also be subject to the Westinghouse gualification test starting April 30, 1979.
This testing is expected to be completed by September 10, 1979 with the report completion scheduled for early November,1979.
The Westinghouse Electric Corporation has advised us that adequate assurance is available as to the performance capabilities of the Lot No.
2
Mr. Harold R. Denton, Director
\\3 AEP:NRC:00142 transmitters which permits installation of these devices prtor to completion of the forthcoming Westinghouse Lot No.
2 test.
Very truly yours, GPM:em Vi.
Presi ent Sworn and subscribed to before me this
~day of May, 1979 in New York County, New York Notary Public I
- THLCEa t err.
HrY NOTARY t CrtuC, 'toto oi rrew York No. 4i-~~( 6'iP
'unliftco in 4uccns County Corti(icnte titcd in New York County Couun eh<oh cxtufes fhcictr 3V ly /
4+I cc:
R.
C, Callen G, Charnoff R,
W, Jurgensen D, V. Shaller-BrjdgrgOn