TXX-3687, Forwards Final Response to IE Bulletin 82-04 Re Bunker Ramo Electrical Penetrations.Required Tests,Insps & Evaluations Complete.All Bunker Ramo Termination Lugs Replaced
| ML20077D172 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 06/14/1983 |
| From: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-SSINS-6820, REF-SSINS-SSINS-6 IEB-82-04, IEB-82-4, TXX-3687, NUDOCS 8307260405 | |
| Download: ML20077D172 (8) | |
Text
-
Lcg # TXX-3687 File # 10115 TENAS UTII.ITIES GENERATING COMPANY 2005 IlltV AN 'I t)M ICit e ll s!A%M TIG AM 75208 June 14,1983
,;;l;oryJ.,._...
Mr. John T. Collins U. S. Nuclear Regulatory Commission Region IV RIV 611 Ryan Plaza Drive, Suite 1000 Docket Nos. 50-445/IE Bulletin No. 82-04 Arlington, Texas 76012 50,446/IE Bulletin No. 82-04
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION
)
b h *[] (V/ g 1
1981-83 2300 MW INSTALLATION i)
IE BULLETIN 82-04 I
JUN 2 01993f ih 2
J
Dear Mr. Collins:
TXX-3627 dated February 23, 1983 provided a preliminary response to IE Bulletin 82-04 and requested an extension until July 1, 1983 for.the submittal of the final response.
CPSES has completed all required inspections, testing and evaluations and has provided the required documentation per item 5b.(2) of the bulletin in enclosure 1.
Approximately 1,550 man-hours were used to perform the required inspections, testing and to prepare the written responses.
Should you have additional questions, please contact this office.
Sincerely, Gary RJG:kp c - U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D.C.
20555 T P' l I I
8307260405 830614 DR ADOCK 050004]
/
l I
i
\\
ENCLOSURE 1 IE BULLETIN 82-04 ITEM:
lA
SUBJECT:
Inspection of conductor terminations at Bunker Ramo provided terminal boxes.
FINDINGS: Bunker Ramo provided terminal boxes for the following four (4) safety-related electrical penetrations:
lE80 2E80 IE81 2E81 Each termination box contained eight (8), #12 AWG conductors which had terminal lugs installed by Bunker Ramo.
CORRECTIVE ACTION REQUIRED: Due to the relatively small number of vendor terminations, the decision was made to replace the Bunker Ramo installed lugs. Using instructions prepared by Electrical Engineering, new site-procured termination lugs were installed on the conductors of the above listed penetrations. The tools used to crimp the lugs were cali-brated per site procedures. All termination activities were witnessed per site procedures by Quality Control personnel.
4
+
v-
--,,,,-------e
-t---,e-
e ENCLOSURE 1 IE BULLETIN 82-04 ITEM:
18
SUBJECT:
Inspection of conductors as they enter and exit Bunker Ramo penetration modules.
FINDINGS: An inspection was conducted to verify the integrity of the insulation around the conductors as they enter and exit the electrical penetration modules. The inspection was intended to identify any conductor with suspected cracked or damaged insulation.- All inspections were
~
witnessed by site Quality Control personnel. At the conclusion of the inspection, there were no conductors identified as having visible damage to its insulation.
A list of the sixty-four (64) safety-related penetrations inspected for potential insulation damage is included as.
CORRECTIVE ACTION REQUIRED: None 4
0 m
- a
..n-----,e~.,
.-,,.,,,,,.,, - - +,.
,-- -- ne
,., -4
-,,,--.,,-,.,,,m..
---,,.w-
r s
ENCLOSURE 1 IE BULLETIN 82-04 ITEM:
1C
SUBJECT:
Inspection of Bunker Ramo provided in-line butt splices for penetration conductors.
FINDINGS: An inspection was conducted to examine the in-line butt splices installed by Bunker Ramo to connect the module conductors to the cable pigtails. A minimum random sam-ple of 25% of each conductor size was inspected. This sample included the inspection of at least two (2) com-plete modules.
Due to accessibility, the sample conductors were selected from-the-penetrations designated for use in Unit 2.
This decision was made after Bunker Ramo provided documentation that verified penetrations were manufactured and assembled according to conductor size and configuration, and inde-pendent of their designated use for Unit 1 or Unit 2.
Each inspection of the in-line butt splices was documented for acceptability per site termination procedures and wit-nessed by site Quality Control personnel. There were no visible indications to suspect that the in-line butt splices were either..overcrisped er-eadercrimped by Bunker Ramo. A list of the penetrations inspected and their corresponding wire sizes is included as Attachment 2.
At the conclusion of the inspection, a random sample of 10%
of the examined in-line butt splices were cut from their conductors and subjected to a one (1) minute direct pull test. The values for the UL 486A (see Attachment 3) pull out force were based on All pull tests were witnessed by site Quality Control personnel.
The in-line butt splices used for wire sizes #6, #8, #10, and #12 passed their respective pull tests. These tests confirmed that the in-line butt splices for these sizes of wires were properly crimped by Bunker Ramo at.d can be used as supplied.
For the pull tests involving the in-line butt splices for the #2 AWG conductors, only four (4) of the six (6) splices successfully passed the test. The two (2) splices which failed their pull test had one (1) conductor separate from the splice at 150 pounds of pull force.
=
-w-
-av
-ww-w-ea
,we--
=,v.c
-vvse--
-m.se-t-vp iW-e-i-7w-we ym-i.-y--
+=7v y--y---i,3Tmys--w spr w e-we - ww-w -g g + 9 -in -v g - ye --y%www- $ w ggn yv-i-eyvW s
o ENCLOSURE 1 CORRECTIVE ACTION REQUIRED: Due to the failure of the splice con-nectors during their pull tests, all safety-related pene.
trations with #2 AWG conductors will have the Bunker Ramo crimped in-line butt splices removed and site-procured in-line butt splices installed. The following four (4) penetrations will be affected:
lE12 2E12 lE59 2E59 All tools used to crimp the site-installed splices will be calibrated per site procedures. All termination ac-tivities will be witnessed per site procedures by Quality Control personnel.
h 0
.l ATTACHMENT 1 ELECTRICAL PENETRATIONS INSPECTED ITEM 1B 1E6 2E6 1E9 2E9 1E10 2E10 1 Ell 2E11 1E12 2E12 1E13 2E13 1E15 2E15 1E16 ZE16 1E17 2E17 1E18 2E18 1E29 2E29 1E31 2E31 1E39 2E39 1E40 2E40 1E45 2E45 1E47 2E47 1E56 2E56
- 1E57 2E57 1E58 2E58-1E59 2E59 1E60 2E60 1E61 2E61 1E62 2ES2 1E63 2E63 1E64 2E64 1E66 2E66 1E76 2E76 1E77 2E77 1E78 2E78 l
1E79 2E79 1E80 2E80 1E81 2E81 e
e t
-,a
,,r-c.-
-,, - ---,-~, _, -,, - -
n
.,w,
a O
e e
q t
ATTACHMENT 2 ELECTRICAL PENETRATIONS INSPECTED ITEM 1C PENETRATION CONDUCTOR SIZE (AWG) 2E12
- 2 2E59
- 2 2E10
- 6 2E56
- 6 2E76
- 6 2E77
- 6 2E10
- 8 2E56
- 8 2E10
- 10 2E56
- 10 2E78
- 12 2E79
- 12 E
e
,.y.
._v._,. _, _
.;~~
ATTACHMENT 3 i
VALUES FOR CONNECTOR PULL TESTS UL 486A WIRE SIZE (AWG)
PULL-0UT FORCE (POUNDS)
- 2 180 1
- 6 100
- 8 90
- 10 4
80
- 12 70 t
l 9
Y+
e e
4 1
..-.