ML20062C982
| ML20062C982 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 07/23/1982 |
| From: | Gerstner W ILLINOIS POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-82 U-0503, U-503, NUDOCS 8208050413 | |
| Download: ML20062C982 (3) | |
Text
.
1 4
1606-L
/LLINO/S POWER COMPANY U-0503 CLINTON POWER STATION. P.O. box 678. CLINTON. ILLINOIS 61727 July 23, 1982 Mr. James G. Keppler Director, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
10 CFR Part 21 Defect PGCC Termination Modules Docket No. 50-461/CPPR-137 On December 7, 1981, Mr. A.J. Budnick of Illinois Power notified Mr. H.M. Wescott, USNRC Region III, of a potential reportable defect per 10 CFR Part 21 regarding PGCC Termination Modules supplied by General Electric Company.
Based upon an evaluation, Illipsis Power is notifying the Commission of a 10 CFR Part 21 defect.
This report provides information as required by 10 CFR Part 21.21(6)(3).
(i)
Mr. A.J. Budnick of Illinois Power intermed Mr. H.M.
Wescott, USNRC Region III, by telephone on December 7, 1981 of a potential 10 CFR Part 21 defect.
Mr. W.C.
Gerstner, Executive Vice President of Illinois Power, by means of this report hereby informs the Commission ot a 10 CFR Part 21 defect.
(ii)
General Electric termination modules (T-mods) with part number 137D7743G053.
(iii)
Supplied by General Electric Company, San Jose, CA.
Manufactured by ACL-Filco Corporation, Santa Ana, CA.
(iv)
T-mods are pre-manufactured subassemblies consisting of a terminal board and a connector receptacle mounted on a metal bracket.
The wiring from the terminal board to the connector is incorrectly wired on all T-mods with part number 137D7743G053.
There are 29 T-mods with this part number.
During normal testing in October, 1981, one T-mode was found incorrectly wired and was correct-ed.
Of the remaining 28 T-mods, 14 carry satety related circuits; therefore, the safety hazard created by this defect is that safety systems will not perform their safety functions.
e208050413 820723 PDR ADOCK 05000461 S
PDR JUL 3 01982 W 47
J.G. Keppler July 23, 1982 NRC Page 2 (v)
Maintenance Work Request #A0434, completed 12/1/81, verified that the 28 remaining T-mods in question were incorrectly wired.
(vi)
The defective T-mods are located on elevation 800 in Main Control Room as follows:
Termination Cabinet T-Mod P701A TCM 25/28 and 49/38 P706A TCM 6/8 P707E TCM 47/43 P711A TCM 42/43 and 28/31 P714A TCM 59/72 P714B TCM 90/92 P715E TCM 75/59 P731F TCM 4/5 P741F TCM 118/119 P742A TCM 117/120 P742E TCM 123/124 P743E TCM 39/40 P715A TCM 26/29 P715B TCM 35/63 P719F TCM 7/30 P730A TCM 34/37 P730B TCM 100/125 P740A TCM 21/114 l
P740E TCM 93/17 P740F TCM 36/42 P744E TCM 41/54, 5/6, and 7/55 P744F TCM 87/89, 29/51 and 62/64 (vii)
A Construction Work Request (5140) was issued on 12/10/81 to make the necessary jumpers to rewire the 28 T-mods.
This work was completed on 12/15/81.
Illinois Power Operations Maintenance Department has correctly rewired the T-mods in accordance with applicable GE wire lists utilizing Maintenance Work Request A-0434.
(viii)
The findings of the IP investigation into this matter have been discussed with General Electric.
GE has indicated that they will investigate this matter for potential applicability at other sites using similar equipment.
In Illinois Power's case, all circuits wired through these T-mods are tested in the field.
The circuits are checked for continuity from the PGCC device through the T-mod to the field device.
The circuits are also functionally checked prior to being released for op-erations, and therefore, just as the T-mod was dis-covered in October, 1981, to be incorrectly wired, so the remaining 28 would have been discovered during normal testing and checkout.
~-
J.G. Keppler July 23, 1982 NRC Page 3 Our evaluation of this reportable defect is available for your review at our offices.
I trust that this letter provides sufficient information for your review and analysis of the prob-lem.
Sincerely, l
VD
(
W.C. Gerstner Executive Vice President cc:
li.H. Livermore, USNRC Director of Inspection and Enforcement - 3 copies U.S. Nuclear Regulatory Commission Washington, DC 20555 Director-Quality Assurance Illinois Department of Nuclear Safety Division of Reactor Safety 1035 Outer Park Drive Springfield, IL 62704
.