2CAN128218, Provides Info to Satisfy Requirements of IE Bulletin 82-02, Degradation of Threaded Fasteners in RCPB of PWR Plants, Action Item 4.No Indication of stress-corrosion Cracking Found
| ML20083P544 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah, Arkansas Nuclear  |
| Issue date: | 12/31/1982 |
| From: | John Marshall ARKANSAS POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-SSINS-6820 2CAN128218, IEB-82-02, IEB-82-2, NUDOCS 8302030520 | |
| Download: ML20083P544 (3) | |
Text
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ARKANSAS POWER & LIGHT COMPANY POST OFRCE BOX 551 LITTLE ROCK. ARKANSAS 72203 (501) 371-4000 December 31, 1982 2CAN128218 l
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Mr. John T. Collins Regional Administrator
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i U. S. Nuclear Regulatory Commission
_j Region IV
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611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011
SUBJECT:
Arkansas Nuclear One - Unit 2 Docket No. 50-368 License No. NPF-6 Report Required by IE Bulletin 82-02, Action Item 4 Gentlemen:
The following information is provided to satisfy the requirements of IE Bulletin 82-02, " Degradation of Threaded Fasteners in the Reactor Coolant Pressure Boundary of PWR Plants," Action Item 4, for ANO-2.
Item 4.a.:
"A statement that Action Item 1 has been completed."
Response
Procedure 1402.130, " Reactor Coolant Pressure Boundary Threaded Fastener Practices," has been implemented as required by Action Item 1.
A copy of this procedure is attached to each job order that involves breaching a reactor coolant pressure boundary as discussed in our letter to NRC dated November 8, 1982, (0CAN118209).
Item 4.b.:
" Identification of the specific connections examined as required by Action Item 2."
Response
In our letter to NRC dated November 8, 1982, OCAN118209, a lieH ng of the leaks that have occurred on bolted closures (addressed by IEB 82-02) throughout commercial operation of ANO-1 & 2 were provided.
Among the leaks listed was an ANO-2 "B" Steam Generator Primary Manway leak.
The threaded fasteners asscciated with this bolted closure and other bolted closures were inspected during the recent ANO-2 refueling outage.
A list of bolted closures for which a threaded fastener inspection was performed is given below:
8302030520 821231
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PDR ADOCK 05000328
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O PDR MEMDEA MiOOLE SOUTH UTILITIES SYSTEM a
f U' Mr. John T. Collins December 31, 1982 2PSV-4633 Pressurizer Relief Inlet Flange 2PSV-4634 Pressurizer Relief Inlet Flange 2E24A Steam Generator Hotleg Manway 2E24A Steam Generator Coldleg Manway 2E24B Steam Generator Hotleg Manway 2E24B Steam Generator Coldleg Manway 2P328 Reactor Coolant Pump Seal Flange ANO-2 Reactor Vessel Head i
Each fastener was removed, cleaned and inspected per IWA-2210 and IWA-2220 of ASME Code Section XI.
Item 4.c.:
"The results of the examinations performed on the threaded fasteners as required by Action Item 2.
If no degradation was observed for a particular connection, a statement to that effect, identification -of the connection and whether the fasteners were examined in place or removed is all that is required.
If degradation was observed, the report should provide detailed information."
Response
All of the threaded fasteners inspected were found satisfactory except for three studs and one nut on the "A" Steam Generator Hotleg Manway which were rejected by visual examination due to heavy pitting on the studs and a gouge on the nut.
One cap screw on the "B" Reactor Coolant Pump Seal Flange was rejected by magnetic particle examination due to a linear indication.
One additional stud on the "A" Steam Generator Hotleg Manway was found to have heavy pitting, but the stud was not pitted enough to warrant rejection.
No indication of stress-corrosion cracking was found on any of the threaded fasteners inspected.
All of the rejected threaded fasteners were replaced by satisfactory fasteners.
This completes our response to IE Bulletin 82-02, Action Item 4, for ANO-2.
Very t uly yours,
[
J hn R. Marshall Manager, Licensing i
JRM:JK: sl I
f STATE OF ARKANSAS
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SS COUNTY OF PULASKI
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I, John R. Marshall, being duly sworn, subscribe to and say that I am Manager, Licensing for Arkansas Power & Light Company; that I have full authority to execute this oath; that I have read the document numbered 2CAN128218 and know the contents thereof; and that to the best of my knowledge, information and belief the statements in it are true.
(-
o-(JohnR. Marshall i
SUBSCRIBED AND SWORN T0 before me, a Notary Public in and for the County and State above named, this 3/
day of r
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1982.
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}i M HF U
U Notary Public l
My Commission Expires:
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