ML20093L842
| ML20093L842 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 10/23/1995 |
| From: | Keuter D ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| SR-95-002-00, SR-95-2, W3F1-95-0174, W3F1-95-174, NUDOCS 9510260091 | |
| Download: ML20093L842 (4) | |
Text
4
. = Entergy ggyp-:*auac.
%tlOnS xaiona.LA 70000 Tel 504 464 3120 D. R. Keuter General Manager Plant Operations
'I Y3Y1-9b-0174 A4.05 PR October 23, 1995 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.
20555
Subject:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 Reporting of Special Report Gentlemen:
Attached is Special Report Number SR-95-002-00 for Waterford Steam Electric Station Unit 3.
This Special Report is submitted per 10CFR50.36(c)(2) and Technical Specifications 4.4.4.5.a and 6.9.2.
Very truly yours,
\\
1J Q D.R. Keuter General Manager Plant Operations DRK/DFL/tjs Attachment cc:
L.J. Callan, NRC Region IV C.P. Patel, NRC-NRR G.L. Florreich J.T. Wheelock - INP0 Records Center R.B. McGehee N.S. Reynolds NRC Resident Inspectors Office Administrator - LRPD 9.600bb
/
9510260091 951o23 l
PDR ADDCK 05000382
- S PDR
SPECIAL REPORT j
SR-95-002-00 Steam Generator Eddy Current Examination j
(7th Refueling)
On October 11, 1995, Waterford 3 completed a 20% inservice eddy current bobbin coil full length examination of each Steam Generator (S/G) and
.1 100% hot leg top of the tubesheet. This report is submitted in accordance with Technical Specification (TS) 4.4.4.5.a, which requires reporting the number of tubes plugged in each S/G within 15 days of completing Inservice Inspection (ISI) of S/G tubes pursuant to TS 6.9.2.
A follow-up report will be submitted in accordance with TS 4.4.4.5.b by October 11, 1996.
The total number of tubes which have been plugged in each S/G are shown
{
below:
S/G #1 S/G #2 Manufacturina/Preservice 6
20 Batwina (Preventive Pluaaina) 149 149 1
First Refueling 0
Second Refuelina 3
0 Third Refuelina 10 9
Fourth Refuelina
- Preventive Plugging as a result 4
5 of ECT
- Batwing Preventive Plugging 156 156 Fifth Refuelina 4
5 i
i 1
- ~
-SPECIAL REPORT SR-95-002-00 Steam Generator Eddy Current Examination (7th Refueling) 4 S/G #1 S/G#2 Sixth Refuelina
. Preventive Plugging as a result 1
2 of ECT
- 40% Thru-Wall Indications 2
0 Seventh Refuelina
. Preventive Plugging as a result 6
3 of ECT
- > 40% thru-wall indications 2
0
- Single circumferential indications 6
1
- S/G #1 cold leg leaking plug replaced
{
t The total number of tubes which have been plugged in each S/G:
S/G #1 S/Gil Total:
349 351
- S/G #1 cold leg Row 41, Line 89 removed and replaced with a ABB-CE rolled' mechanical plug. ABB-CE identified the leaking plug due to the build-up of boric acid crystals around the OD of the plug.
The CE leaking rolled mechanical plug was installed as a preventive measure August 1985 prior to commercial operation. The ABB-CE rolling process was suspect shortly after installation which caused Waterford 3 to re-roll 149 CE plugs per channel head in each S/G (12/86).
As evident by boric acid build-up, the ABB-CE leaking plug was removed by TIG relaxation and replaced with another rolled mechanical plug.
CR-95-0895 was written on October 3,1995 to evaluate root cause of plug failure.
2 E
i SPECIAL REPORT SR-95-002-00 4
Steam Generator Eddy Current Examination (7th Refueling) l t
j In compliance with Waterford 3's response to Generic Letter 95-03, Waterford 3 utilized the "Plus Point" coil probe to identify a total of seven hot leg top of'the tubesheet small (</= 20% thru-wall, OD
' initiated) single circumferential indications. The results of completing a 100% hot leg top of the tubesheet plus point coil inspection of both S/Gs has identified the following indications:
Sinale Circumferential Indications S/G #1 S/G #2 6
1 4
i t
i.
4 b
1 3