L-10-013, Steam Generator Tube Inspection Report - Technical Specification 5.6.6.2.4
| ML100491087 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/11/2010 |
| From: | Harden P FirstEnergy Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-10-013 | |
| Download: ML100491087 (7) | |
Text
.1 FENOC Beaver Valley Power Station FirstEnergyNuclear Operating Company P.O. Box 4 Shippingport,PA 15077 PaulA. Harden 724-682-5234 Site Vice President Fax: 724-643-8069 February 11, 2010 L-10-013 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
Beaver Valley Power Station, Unit No. 2 Docket No. 50-412, License No. NPF-73 Steam Generator Tube Inspection Report- Technical Specification 5.6.6.2.4 In accordance with Technical Specification 5.6.6.2.4, FirstEnergy Nuclear Operating Company hereby submits a report containing tube inspection results for Beaver Valley Power Station, Unit No. 2, steam generators. The attachment to this letter provides information required by the technical specification that was obtained during inspections conducted during the fall 2009 refueling outage.
There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Thomas A. Lentz, Manager -
Fleet Licensing, at (330) 761-6071.
Paul A. Harden
Attachment:
Beaver Valley Power Station Unit No. 2 Steam Generator Tube Inspection Report
Beaver Valley Power Station, Unit No. 2 L-10-013 Page 2 cc: Nuclear Regulatory Commission Region I Administrator Nuclear Regulatory Commission Resident Inspector Nuclear Reactor Regulation Project Manager Director Bureau of Radiation Protection/Department of Environmental Protection (BRP/DEP)
Site BRP/DEP Representative
Attachment L-10-013 Beaver Valley Power Station Unit No. 2 Steam Generator Tube Inspection Report Page 1 of 5 This report is provided pursuant to Technical Specification (TS) 5.6.6.2.4 with respect to steam generator (SG) tube inspections conducted during the fall 2009 refueling outage (2R14).
During the 2R14 outage, the Plus Point probe was used to inspect the hot leg top of the tubesheet region.
The inspection scope was 100 percent of the active hot leg tubes in all SGs. The inspection distance was from 6.0 inches above the top of tubesheet to 3.0 inches below the top of tubesheet, including examination of the F* distance below the bottom of roll expansion transition. Ten tubes with roll expansion transitions at lower than nominal elevations were inspected to a depth of 5.0 inches below the top of tubesheet to ensure that the F* distance was adequately examined.
Tables A through C provide tabulations of inspection results found in the tubesheet region. Consistent with the reporting requirements of TS 5.6.6.2.4, each of the tables provides the following information for the respective SG:
- a. Total number of indications, location of each indication, orientation of each indication, severity of each indication, and whether the indications initiated from the inside or outside surface,
- b. The cumulative number of indications detected in the tubesheet region as a function of elevation within the tubesheet,
- c. The projected end-of-cycle accident-induced leakage from tubesheet indications.
All indications observed were plugged upon detection. All circumferential indications were stabilized prior to installing the hot leg plug. None of the indications that were removed from service during 2R14 represented a leakage potential at postulated main steam line break conditions during Cycle 14.
Tables D through F provide inspection results for indications found in non-tubesheet regions of the SGs.
The following is a summary of the degradation observed during the 2R14 tubesheet region examinations.
SG "A"Hot Leg:
Thirty-six tubes were plugged for indications reported during the hot leg tubesheet region examination.
Of the 36 tubes, 33 tubes were reported with either single or multiple circumferential outside diameter stress corrosion cracking (ODSCC) indications located at or slightly below the top of tubesheet, 2 tubes were reported with single axial ODSCC indications located above the top of tubesheet, and 1 tube was reported with a single circumferential ODSCC indication located above the top of tubesheet. Table A provides a tabulation of these results.
Attachment L-10-013 Page 2 of 5 Table A 2R14 Tubesheet Indications - SG A Indication Location Severity' Initiation Axial Arc Surface/ Projected Orientiation*
SG Row Column Elevation* Volts Length Length Degradation Leakage A 2 46 TSH +0.02" SCI 0.09 560 ODSCC 0 A 4 30 TSH -0.06" SCO 0.18 2010 ODSCC 0 A 5 37 TSH -0.02" SCI 0.16 400 ODSCC 0 A 6 31 . TSH -0.09" SCI 0.13 430 ODSCC 0 A 7 56 TSH -0.04" SCI 0.25 1370 ODSCC 0 A 10 53 TSH -0.03" SCI 0.14 630 ODSCC 0 A 10 65 TSH -0.11" scI 0.11 71° ODSCC 0 A 12 43 . TSH -0.10" scI 0.16 460 ODSCC 0 A 17 41 TSH -0.09" SCI 0.13 40' ODSCC 0 A 17 42 TSH -0.13" SCI 0.15 151' ODSCC 0 A . 18 77 TSH -0.10" SCI 0.13 500 ODSCC 0 A 20 34 TSH -0.17" SCI 0.16 59' ODSCC 0 A 21 20 TSH -0.11" SCI 0.17 630 ODSCC 0 A 21 23 TSH -0.13" SCI 0.15 1000 ODSCC 0 A 23 25 TSH -0.13" SCo 0.10 590 ODSCC 0 A 23 73 TSH -0.06" MCI 0.15 1580 ODSCC 0 A 25 24 TSH -0.16" SCI 0:09 1080 ODSCC 0 A 25 27 TSH -0.12" SCI 0.11 40' ODSCC 0 A 25 71 TSH -0.0T' SCI 0.13 200 ODSCC 0 A 26 23 TSH -0.10" ScI 0.33 1670 ODSCC 0 A 27 20 TSH -0.15" MCI 0.13 1240 ODSCC 0 A 28 22 TSH -0.11" MCI 0.13 1640 ODSCC 0 A 30 69 TSH -0.05" SCI 0.24 840 ODSCC 0 A 31 37 TSH -0.12" MCI 0.09 1260 ODSCC 0 A 31 71 TSH -0.07" SCI 0.26 1990 ODSCC 0 A 31 75 TSH -0.107 SCI 0.09 480 ODSCC 0 A 33 51 TSH -0.13" SCI 0.05 300 ODSCC 0 A 36 35 TSH -0.04" MCI 0.11 900 ODSCC, 0 A 36 45 TSH -0.07" SCI 0.24 175' ODSCC 0 A 36 68 TSH -0.05" MCI 0.26 1210. ODSCC 0 A 37 58 TSH +0.73" SAI 0.09 0.22" ODSCC 0 A 38 29 TSH +0.64" SAI 0.09 0:38" ODSCC 0 A - 39 44 TSH -0.07" SCI 0.14 450 ODSCC 0 A 41 48 TSH -0.02" SCI 0.31 1030 ODSCC 0 A 42 46 TSH +0.00" SCI 0.14 1100 ODSCC 0 A 42 47 TSH -0.03" SCI 0.10 21o ODSCC 0 TSH - Tubesheet (hot leg)
MCI - Multiple circumferential indications SAI - Single axial indication SCI - Single circumferential indication Reported using the 300 kHz Plus Point coil
Attachment L-10-013 Page 3 of 5 SG "B" Hot Le6q:
Eighteen tubes were plugged for indications reported during the hot leg tubesheet region examination. Of the 18 tubes, 11 tubes were reported with either single or multiple circumferential ODSCC indications located at or. slightly below the top of tubesheet, 5 tubes were reported with single axialODSCC indications locatedabove the top of tubesheet, and 2 tubes were reported with single circumferential ODSCC indications located above the top of tubesheet. Table B provides a tabulation of these results.
TableeB 2R14 Tubesheet Indications - SG B Indication Location Severity*** Initiation Projected SG Row Column Elevation* Orientiation** Axial, Arc Surface/ Leakage Volts Length Length Degradation Leakage B 5 39 TSH +0.56" SAI. 0.25 0.36" ODSCC 0 B 6 54 TSH +0.10" SAI 0.14 0.16" ODSCC 0 B 8 36 TSH -0.17" MCI 0.19 91° ODSCC 0 B 9 34 TSH -0.08" MCI 0.19 90° ODSCC 0 B 9 41 TSH -0.07" SCI 0.10 33" ODSCC 0 B 10 42 TSH +0.03" SCI 0.12 103" ODSCC 0 B 11 .48 TSH -0.05" SCI 0.14 103" ODSCC 0 B 16 11 TSH -0.09" SCI 0.10 23" ODSCC 0 B 17 26 TSH +0.09" SAI 0.19 0.21" ODSCC 0 B 17 .27 TSH +0.07" SAI 0.24 0.21" ODSCC 0 B 17 30 TSH -0.12" SCI 0.07 770 ODSCC 0 B 18 27 . TSH +0.04" SAI 0.16 0.28" ODSCC 0 B 20 43. TSH -0.11" MCI .0.11 170" ODSCC 0 B 30 49 TSH +0.03" SCI 0.09 112" ODSCC 0 B 32 38 TSH -0.03" SCI 0.15 27" ODSCC 0 B 32 46 TSH -0.04" SCI 0.10 133" ODSCC 0 B 35 46 TSH -0.11" SCI 0.11 . 40" ODSCC 0 B 36 52 TSH -0.15" SCI 0.16 96 QODSCC 0
- TSH - Tubesheet (hot leg)
- MCI - Multiple circumferential indications SAI - Single axial indication SCI - Single circumferential indication Reported. using the 300 kHz Plus Point coil t--"
Attachment L-10-013 Page 4 of 5 SG "C" Hot Leq:
Twenty-five tubes were plugged for indications reported during the hot leg tubesheet region examination.
Of the 25 tubes, 23 tubes were reported with either single or multiple circumferential ODSCC indications located at or slightly below the top of tubesheet, 1 tube Was reported with a single axial ODSCC indication located above the top of tubesheet, and 1 tube was reported with a single circumferential ODSCC indication located above the top of tubesheet. Table C provides a tabulation of these results..
TableC 2R14 Tubesheet Indications - SG C Indication Location Severity' Initiation Projected SG Row Column Elevation* Orientiation** Axial Arc Surface/ Leakage Volts Length Length Degradation Leakage C 1 55 TSH -0.10" SCI 0.24 1620 ODSCC 0 C 2 53 TSH -0.12" SCI 0.11 46' ODSCC 0 C 4 30 TSH -0.13" MCI 0.12 117' ODSCC 0 C 5 20 TSH -0.09" . SCI 0.08 78' ODSCC 0 C 6 40 TSH +0.55" SAI 0.29 0.51". ODSCC 0 C 7 57 TSH -0.09" SCI 0.22 115o ODSCC 0 C 9 70 TSH -0.12" SCI 0.17 81.' ODSCC 0 C 11 44 TSH-0.14" SCI 0.20 750 ODSCC 0 C 15 21 TSH -0.04" SCI 0.12 92" ODSCC 0 C 15 24 TSH +0.00" SCI 0.17 62" ODSCC 0 C 15' 41 TSH -0.09" SCI 0.16 134' ODSCC .0 C 16 24 TSH -0.05" SCI 0.06 23' ODSCC 0 C 18 49 TSH -0.07" SCI 0.12 106" ODSCC 0 C 19 60 TSH -0.10 ' SC. 0.16 65" ODSCC 0 C_ 19 70 TSH -0.06" SCI 0.17 56" ODSCC 0.
C 21 39 TSH +0.09" SCI 0.14 43" ODSCC 0 C 28 25 TSH -0.19" MCI 0.09 155" ODSCC' 0 C 29 42 TSH -0.09" SCI 0.11 36" ODSCC 0 C 33 66 TSH -0.11" SCI 0.14 39" ODSCC 0 C 34 48 TSH -0.08" SCI 0.12 39" ODSCC 0 C 34 52 TSH -0.12" SCI 0.09 24" ODSCC . 0 C 35 47 TSH -0.11" SCI 0.11 39" ODSCC 0 C 35 49 TSH -0.11" SCI 0.15 50' ODSCC 0 C 36 54 TSH -0.10" SCI 0.05 18" ODSCC . 0 C 37 58 TSH -0.09" SCI 0.13 62" ODSCC 0
- TSH-- Tubesheet (hot leg)
- MCI - Multiple circumferential indications SAI - Single axial indication SCI - Single circumferential indication Reported using the 300 kHz Plus Point coil
Attachment L-10-013 Page 5 of 5 Non-Tubesheet Region:
Tables D, E, and F provide a list of tubes that were removed from service for degradation in otherareas of the steam generators. This information is being submitted for completeness of the tube plugging performed during 2R14 and is not required by Technical Specification 5.6.6.2.4.
Table D Steam Generator A Indication Location Severity*** Initiation Projected Orientiation** Axial Arc Surface/ Leakage SG Row Column Elevation* Volts Length Length Degradation A 32 47 1C +0.74" SVI 0.12 0.16" 260 WEAR 0 A 38 36 3H +0.01" SAI 0.10 0.21" ODSCC 0 Table E Steam Generator B Indication Location Severity*** Initiation SG Row Column Elevation* Orientiation** Axial Arc Surface/ Projected Volts Length. Length Degradation Leakage B 2 20 5H -0.01" SAI 0.12 0.26" ODSCC 0 B 17 31 3H +0.00" SAI 0.28 0.44" ODSCC 0 B 17 39 3H -0.04" SAI 0.28 0.21" ODSCC 0 B 21 52 2H +0.11" SAI 0.11 0.31" ODSCC 0 B 36 56 AV3 +0.00" 40% 6.13 WEAR 0 Table F Steam Generator C Indication Location 7 Severity*** Initiation Projected SG Row Column Elevation*. Volts Length LenAc Surac l egth Degradation Leakage C 3 26 3H +0o01" SAI 0.12 0.44" ODSCC 0 C 13 49 2H +9.70" SCI 1.01 35' ODSCC 0 C 19 35 3H -0.16" SAI 0.10 0.20" ODSCC 0 C 23 60 2H +0.03" SAI 0.11 0.30" ODSCC 0 C 32 71 2H +0.20" SAI 0.12 0.26" ODSCC 0 C 43 36 3H +2.70" SCI 1.09 430 ODSCC 0 2H, 3H, 5H = 2 , 3 d 5th Hot leg tube support plate 10 = 1 st Cold leg tube support plate (flow distribution baffle)
AV3= 3 rd Anti-vibration bar