ML052090243
| ML052090243 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 07/26/2005 |
| From: | Bezilla M FirstEnergy Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 3164, GL-04-001, TAC MC4816 | |
| Download: ML052090243 (16) | |
Text
FENOC FirstEnergy Nuclear Operating Company 5501 North State Route 2 Oak Harbor. Ohio 43449 Mark B. Bezilla Vice President - Nuclear 419-321-7676 Fax: 419-321-7582 July 26, 2005 Docket Number 50-346 License Number NPF-3 Serial Number 3164 United States Nuclear Regulatory Commission Document Control Desk Washington, D. C. 20555-0001
Subject:
Response to Request for Additional Information on Generic Letter 2004-01 (TAC No.
Ladies and Gentlemen:
By letter dated October 29, 2004 (Serial Number 3096), the FirstEnergy Nuclear Operating Company (FENOC) submitted its response to Generic Letter 2004-01 for the Davis-Besse Nuclear Power Station (DBNPS). By e-mail on April 6, 2005, the NRC requested additional information regarding FENOC's response to Generic Letter 2004-01. The FENOC responses to this request are provided in Attachment 1. Attachment 2 provides a list of regulatory commitments made in this submittal.
Should you have any questions or require additional information, please contact Mr. Henry L. Hegrat, Supervisor - Licensing, at (330) 315-6944.
I1
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 2 The statements contained in this submittal, including its associated attachments, are true and correct to the best of my knowledge and belief. I declare under penalty of perjury that the foregoing is true and correct.
Executed on:
J.%( a 2Lxgr.
By:
Mark B.
MAR Attachments cc:
J. L. Caldwell, Regional Administrator, NRC Region III W. A. Macon, Jr., DB-1 NRC/NRR Project Manager C. S. Thomas, DB-1 NRC Senior Resident Inspector Utility Radiological Safety Board
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 1 of 13 FENOC Response to NRC Request for Additional Information Davis-Besse Nuclear Power Station Generic Letter 2004-01 Question L.a
- 1. FENOC's response to GL 2004-01 indicated that the Davis Besse steam generator tube inspection approach/methods are consistent with the NRC's position provided in GL 2004-01.
Table 1 in the response indicates that the +Pointfim probe was used to inspect 23% of the tubes in the lower tubesheet sludge pile/crevice region.
l.a. Provide the technical basis demonstrating that bobbin coil inspection is capable of reliably detecting the potential forms of degradation (e.g., intergranular attack (IGA), stress corrosion cracking (SCC)) in this area, considering that other plants with similar design steam generators have stated that tubes in the kidney region require the use of rotating coil for better detection of IGA due to sludge build up in the upper portion of the lower tubesheet crevice.
Response
Bobbin coil examination has been qualified for detection of Outer Diameter Stress Corrosion Cracking (ODSCC) and IGA under the following Examination Technique Specification Sheets (ETSSs)
> 96007.1 Detection of IGA/ODSCC at non-dented drilled supports
> 96008.1 Detection of axial ODSCC in sludge pile region
> 96009.1 Detection of IGA in OTSG upper tubesheet These techniques may be applied for detection of ODSCC and IGA in the Once Through Steam Generator (OTSG) lower tubesheet region if the qualified technique's essential variables are shown to be consistent with site-specific steam generator (SG) conditions. Prior to the thirteenth refueling outage (13RFO), a review was performed to confirm that the site-specific SG conditions at the Davis-Besse Nuclear Power Station (DBNPS) were consistent with those in the above technique qualifications. A similar technique review was performed prior to the mid-cycle 14 outage (14MCO).
Experience from another OTSG unit has shown active tube degradation within the lower tubesheet region, and a degraded detection performance of the bobbin coil examination.
Engineering judgment dictates that these conditions be addressed even though the bobbin coil techniques are site qualified under the requirements of Revision 6 of the EPRI Pressurized Water Reactor Steam Generator Examnination Guidelines ("the EPRI Guidelines").
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Attachment I Page 2 of 13 The 100% bobbin coil examination in the DBNPS OTSG's is the primary detection method for IGA or ODSCC within the OTSG lower tubesheet. The extent of this examination is larger than the 20% sample required by the EPRI Guidelines for a non-active damage mechanism. The 100% bobbin coil examination, even with a reduced probability of detection, is more likely to detect a degraded tube condition than a 20% sample with a high probability of detection.
However, the bobbin coil examination alone is not considered sufficient to provide the added assurance desired for detecting the onset of tube degradation within the lower tubesheet. The DBNPS has added a 23% +PointTM probe examination of a defined "kidney region" which consists of approximately 2100 tubes with a border of 570 tubes. The Davis-Besse "kidney region" was conservatively based on a worst case OTSG "kidney region" from another site which bounds the persistent sludge/denting region in the Davis-Besse SGs.
Since the start of 12RFO in April of 2000, the DBNPS has performed a total of 1502 +PointTh probe examinations in the lower tubesheet kidney region of SG A and 1500 +PointThi probe examinations in the lower tubesheet kidney region of SG B for the purposes of detecting the onset of any tube degradation and identifying any potential reduction in the bobbin coil detection performance. The +PointThi probe examination by itself is sufficient to satisfy the requirements for detecting the onset of non-active degradation within the "kidney region."
Inspections to date have found no +PointP indications in the Davis-Besse SG lower tubesheet regions that were missed by the bobbin examination and have demonstrated that tube degradation modes within the lower tubesheet are not active at the DBNPS. The +Point'P probe sample provides a confirmation of the bobbin coil detection performance and provides an additional examination meeting the requirements of the EPRI Guidelines for the detection of the onset of the damage mechanism within the OTSG lower tubesheet.
Since dents can challenge the detection performance of the bobbin probe examination as documented in the EPRI technique qualification for ETSS 96007.1, all dents detected during the bobbin coil exam are identified at 2.5 Volts. A separate examination group has been established for a +PointThl probe inspection of dents equal to or greater than 2.5 Volts. During 13RFO, 116 of the 187 dents in the lower tubesheet region (extending from the lower roll transition to above the maximum sludge height -Lower Tube End (LTE) + 3" to Lower Tubesheet Secondary face (LTS) + 6.0") of SG A and 32 of the 54 dents in the LTS region of SG B were examined with the
+PointP probe with no detected degradation. During the 14MCO examination, all 187 dent indications in SG A and all 61 dent indications in SG B were examined with the +PointTM probe technique with no degradation detected.
In summary, a +PointTm probe sampling program is used to supplement the 100% bobbin coil examination in the DBNPS OTSGs to detect the onset of tube degradation in the lower tubesheet region and to identify any reduction of the bobbin coil detection performance. Either technique by itself exceeds the requirements of the EPRI Guidelines for a non-active degradation mechanism.
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 3 of 13 Ouestion L.b L.b. In addition, for each indication within the sludge pile and in other areas of the lower tubesheet (excluding tube end cracking), provide a summary that includes the indication's location, the nature of the indication (IGA, SCC, etc.), the indication's severity (length and depth), and whether the indication was detected by bobbin coil inspection, rotating probe inspection, or both. Discuss whether rotating probe inspections detected indications that were not detected by the bobbin coil probe, and if so, the implications of this finding.
Response
ROTATING COIL EXAMINATIONS A database search was performed for all rotating examination indication codes reported within the range of LTE+3" to LTS+6" from 6RFO (March 1990) through the last outage (14MCO, January 2005). There were four indications in SG A and no indications in SG B. Table I shows the rotating coil indications and the corresponding bobbin coil indications. In the table, RFO is a designator for Refueling Outage, VOL is rotating coil indication code for a volumetric type indication, SVI is a rotating coil indication code for a Single Volumetric Indication, ODI is a bobbin coil indication code for Outer Diameter Indication and NQI is a bobbin coil indication code for Non-Quantifiable Indication. The column headings DEG stands for the phase angle in degrees, IND stands for the three letter indication code, CIRC is for the eddy current measured circumferential extent, AXIAL is for the eddy current measured axial extent, LOC is for the landmark reference, and INCH is the offset from the landmark reference. The LTE designation is for the Lower Tube End and the LTS indication is for the Lower Tubesheet Secondary face.
Table 1 -Rotating Coil Indications Since 8RFO ROTATING COIL BOBBIN OUTAGE SG ROW TUBE PROBE VOLTS DEG IND CIRC AXIAL LOC INCH PROBE VOLTS DEG IND LOC INCH (f)
(In)
(in)
(in)
(V)
(In)
RFO B A
15520 0.51 84 VOLI n/a Ina ILTE l 6.69 510 l 0.42 1 74 ODI LTE 6.74 RFO B A
40 42 520 1 0.18 _ 79 IVOLI n/a I ria I LTEI 18.75 510 l 0.48 112210DI LTEl 19.81 11 RFO A
113 10 4 520PP 0.34 73 SVI 1 0.24 0.06 LTS 1 -0.4 510UL 0.33 93 NOI ILTS.0.48 12 RFO A
105 98 520PP 0.16 114 SVI 0.17 021 LTS
-1.7 51OUL 0.16 89 NOI LTE 22.36 All of these indications were detected by the bobbin probe examination as shown above. All of the indications from this region had characteristics of volumetric degradation (IGA like). The indications during 8RFO (March 1993) were examined with a pancake coil instead of the
+PointTm probe. The two more recent indications during 1 IRFO and 12RFO were both less than 0.5 volts on the +Point'7 probe examination. Although depth sizing is not qualified, the low voltage and low extents show that the indications were not severe.
During 14MCO, the +PointTP probe was used to inspect lower rolls in the DBNPS steam generators. SG A had no indications or unusual conditions reported for this examination scope.
However, SG B had 34 crack-like indications and 3 volumetric indications in 36 tubes from the Lower Roll Transition (LRT) examination. The difference between the generators is the fact that SG B had factory installed re-rolls in all but 122 tubes. These re-rolls changed the conditions of the roll transitions and tube ends such that they became more susceptible to cracking. The 36 tubes with LRT degradation were removed from service. Since the bobbin coil is not qualified
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 4 of 13 for examination of the LRT region, a +PointTm probe examination of 100% of the in-service LRT region of SG B was performed during 14MCO.
An examination of the LRT region in SG A was also performed using the +PointTm probe but was limited to a 21% sample based on the fact that the degradation mechanism was associated with a condition specific to SG B.
Table 2 provides the details of the SG B LRT indications detected during 14MCO. In the table, MCI stands for Multiple Circumferential Indication, SVI stands for Single Volumetric Indication, SAI stands for Single Axial Indication, SCI stands for Single Circumferential Indication, ARC stands for an Arc length measurement, LEN stands for an Axial length measurement, and CLP is a designation for a measurement of axial and circumferential extents for a volumetric indication. Depth is expressed in percent through-wall.
Tablc 2 - SG B LRT Indications During 14MCO ROTATING COIL DETECTION ROTATING COIL EXTENT SIZING ROW TUBE PROBE VOLTS DEG IND DEPTH LOC INCH PROBE ARC LENGTH IND LOC INCH (V)
(%TW)
(In)
(in)
(in) 56 27 520PP 0.68 22 MCI 71 LTE 1.59 52OPP 0.71 ARC LTE 1.59 60 29 520PP 0.41 32 SVI 98 LTE 1.63 520PP 0.2 0.23 CLP LTE 1.63 48 34 52OPP 1.17 34 MCI 97 LTE 1.84 520PP 0.69 ARC LTE 1.84 48 34 520PP 1.14 22 SAI 62 LTE 1.71 520PP 0.24 LEN LTE 1.71 50 34 520PP 1.14 30 MCI 99 LTE 1.88 520PP 1.88 ARC LTE 1.88 48 35 520PP 0.56 29 SAI 90 LTE 1.92 520PP 0.15 LEN LTE 1.92 31 54 520PP 0.47 19 SCI 55 LTE 1.48 520PP 0.42 ARC LTE 1.48 81 57 52OPP 0.71 15 SCI 29 LTE 1.4 520PP 0.32 ARC LTE 1.4 92 57 520PP 0.58 17 MCI 70 LTE 1.78 520PP 0.33 ARC LTE 1.78 91 65 52OPP 0.78 49 MCI 93 LTE 1.55 520PP 0.82 ARC LTE 1.55 89 66 520PP 0.3 1
SCI 2
LTE 1.37 520PP 0.2 ARC LTE 1.37 91 66 520PP 0.36 29 SCI 95 LTE 1.56 520PP 0.23 ARC LTE 1.56 78 67 520PP 1.84 10 SVI 41 LTE 0.73 520PP 0.3 0.35 CLP LTE 0.73 87 67 520PP 0.86 30 MCI 99 LTE 1.27 520PP 0.56 ARC LTE 1.27 88 67 520PP 0.77 23 MCI 68 LTE 1.97 520PP 0.63 ARC LTE 1.97 92 67 520PP 0.8 42 MCI 96 LTE 1.53 520PP 1.56 ARC LTE 1.53 86 68 520PP 0.62 25 MCI 79 LTE 1.56 520PP 0.85_
ARC LTE 1.56 78 69 52OPP 0.74 27 SCI 85 LTE 1.49 52OPP 0.2 ARC LTE 1.49 85 69 520PP 0.67 50 SCI 93 LTE 1.63 520PP 0.22
'ARC LTE 1.63 88 69 520PP 0.87 21 MCI 60 LTE 1.52 520PP 0.43 ARC LTE 1.52 88 70 520PP 0.52 38 SCI 97 LTE 1.53 520PP 0.24 ARC LTE 1.53 91 71 520PP 1.89 6
SCI 15 LTE 0.37 520PP 0.32 ARC LTE 0.37 81 73 520PP 1.05 12 SVI 27 LTE 0.94 520PP 0.19 0.2 CLP LTE 0.94 82 73 520PP 1.08 27 MAI 81 LTE 1.34 52OPP 0.21 LEN LTE 1.34 89 73 520PP 0.52 24 MCI 75 LTE 1.63 520PP 1.34 ARC LTE 1.63 83 74 520PP 0.4 31 SAI 100 LTE 1.39 52OPP 0.19 LEN LTE 1.39 51 75 52OPP 0.52 20 MCI 60 LTE 1.42 520PP 0.85 ARC LTE 1.42 49 76 52OPP 0.52 25 MCI 23 LTE 1.46 520PP 0.48 ARC LTE 1.46 53 76 520PP 0.68 23 MCI 72 LTE 1.46 520PP 0.29 ARC LTE 1.46 56 76 520PP 0.66 24 MCI 75 LTE 1.3 520PP 0.61 ARC LTE 1.3 49 77 52OPP 0.33 22 SCI 68 LTE 1.24 520PP 0.22 ARC LTE 1.24 47 78 520PP 0.53 23 SCI 72 LTE 1.47 52OPP 0.19 ARC LTE 1.47 57 78 52OPP 0.52 16 SCI 48 LTE 1.69 52OPP 0.19 ARC LTE 1.69 52 79 52OPP 0.55 25 MCI 71 LTE 1.46 520PP 0.49 ARC LTE 1.46 57 79 52OPP 0.54 17 SCI 51 LTE 1.67 520PP 0.22 ARC LTE 1.67 53 93 52OPP 0.35 20 SCI 63 LTE 1.54 520PP 0.23 ARC LTE 1.54 43 103 520PP 0.77 47 SAl 86 LTE 1.62 520PP 0.33 LEN LTE 1.62
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 5 of 13 BOBBIN COIL EXAMINATIONS A database search was performed for all bobbin coil Non-Quantifiable Indications within the range of LTE+3" to LTS+6" from 1 RFO (April 1998) through the last outage 14MCO (January 2005). Tables 3 through 10 show the bobbin coil indications as well as the +PointTm results for SG A and then SG B. The NQI designation in the table is for Non Quantifiable Indication, NDF stands for No Degradation Found by the rotating coil exam, and MBM is a designation for a Manufacturing Buff Mark.
Table 3 - SG A NQIs During 11RFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V)
(in) 54 5
510UL 0.21 80 NQI LTS
-0.63 520PP NDF LTS -0.63 101 10 51OUL 0.38 101 NQI LTE 4.26 520PP NDF LTE 4.26 47 25 51OUL 0.16 111 NQI LTE 21.03 520PP NDF LTE 21.03 54 34 S5OUL 0.38 102 NQI LTS -0.91 520PP NDF LTS -0.91 96 39 510UL 0.41 87 NQI LTS -0.37 520PP NDF LTS -0.37 96 40 51OUL 0.28 133 NQI LTS
-0.41 520PP I NDF LTS -0.41 96 41 51OUL 0.34 86 NQI LTS
-0.37 520PP NDF LTS -0.37 65 45 51OUL 0.43 115 NQI LTE 13.39 520PP NDF LTE 13.39 66 52 51OUL 0.47 98 NOI LTS
-0.22 520PP NDF LTS -0.22 94 53 51OUL 0.24 108 NOI LTE 3.23 520PP NDF LTE 3.23 96 57 51OUL 0.45 81 NOI LTS
-0.32 520PP NDF LTS -0.32 47 61 51OUL 0.21 107 NQI LTE 10.04 520PP NDF LTE 10.04 34 62 51OUL 0.27 100 NOI LTE 21.22 520PP NDF LTE 21.22 119 62 510UL 0.3 126 NQI LTE 21.42 520PP NDF LTS -2.58 81 63 51OUL 0.22 106 NQI LTS
-0.3 520PP NDF LTS
-0.3 61 75 51OUL 0.56 81 NQI LTS 0.21 520PP NDF LTS 0.21 62 77 51OUL 0.74 88 NQI LTS 0.24 520PP NDF LTS 0.24 65 78 51OUL 0.73 86 NQI LTS 0.24 520PP NDF LTS 0.24 66 78 51OUL 0.56 101 NQI LTS 0.39 520PP NDF LTS 0.39 84 82 51OUL 0.34 81 NQI LTE 3.48 520PP NDF LTE 3.48 118 92 51OUL 0.5 117 NQI LTE 21.68 520PP NDF LTS -2.32 118 92 S5OUL 0.3 120 NQI LTE 21.23 520PP NDF LTS -2.77 119 94 51OUL 0.46 116 NQI LTE 16.67 520PP NDF LTE 16.67 123 95 51OUL 0.32 85 NOI LTE 3.4 520PP NDF LTE 3.4 113 104 51OUL 0.33 93 NQI LTS -0.48 520PP 0.34 73 SVI LTS
-0.4 96 112 51OUL 0.41 101 NQI LTS -1.09 520PP NDF LTS -1.09 97 121 51OUL 0.27 98 NQI LTS
-0.58 520PP NDF LTS -0.58 93 122 51OUL 0.49 121 NQI LTS -0.77 520PP NDF LTS -0.77
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 6 of 13 Table 4 - SG A NQIs During 12RFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V)
(in) 120 11 51OUL 0.36 115 NQI LTE 17.83 520PP NDF LTE 17.83 32 40 51OUL 0.26 89 NQI LTE 6.74 520PP NDF LTE 6.74 39 55 51OUL 0.22 106 NQI LTE 19.64 52OPP NDF LTS -4.36 79 57 51OUL 0.41 86 NQI LTS -0.36 52OPP NDF LTS -0.36 27 59 51OUL 0.16 87 NOI LTE 20.51 520PP NDF LTS -3.49 83 61 51OUL 0.44 57 NQI LTS -0.23 520PP I NDF LTS -0.23 61 65 51OUL 0.57 81 NQI LTS -0.07 52OPP NDF LTS -0.07 64 68 510UL 0.22 89 NQI LTE 21.63 52OPP NDF LTE 21.63 88 69 51OUL 0.22 116 NQI LTS 5.52 520PP NDF LTS 5.52 79 70 510UL 0.19 102 NQI LTS -0.19 52OPP NDF LTS
-0.19 62 73 51OUL 0.47 101 NQI LTS 0
520PP NDF LTS 0
96 73 51OUL 0.5 118 NOI LTS
-0.3 52OPP NDF LTS
-0.3 76 74 51OUL 0.5 78 NOI LTS -0.34 520PP NDF LTS -0.34 61 75 51OUL 0.58 73 NOI LTS 0.2 520PP NDF LTS 0.2 62 77 51OUL 0.62 76 NQI LTS 0.23 520PP NDF LTS 0.23 63 78 51OUL 1.03 61 NQI LTS -0.16 520PP NDF LTS
-0.16 64 79 51OUL 0.68 75 NQI LTS 0.19 520PP NDF LTS 0.19 66 79 51OUL 0.56 80 NOI LTS 0.23 520PP NDF LTS 0.23 64 80 51OUL 0.56 80 NOI LTS 0.19 520PP NDF LTS 0.19 66 80 51OUL 0.72 54 NQI LTS 0.25 520PP NDF LTS 0.25 84 80 51OUL 0.32 92 NOI LTS
-0.13 520PP NDF LTS -0.13 119 94 51OUL 0.58 93 NQI LTE 16.22 520PP NDF LTE 16.22 105 98 51OUL 0.16 89 NQI LTE 22.36 520PP 0.16 114 SVI LTS
-1.7 94 101 51OUL 0.42 98 NOI LTE 7.15 520PP NDF LTE 7.15 96 112 51OUL 0.19 100 NOI LTE 22.36 520PP NDF LTS -1.64 96 112 51OUL 0.58 88 NQI LTE 21.8 520PP NDF LTS
-2.2 106 118 51OUL 0.56 80 NQI LTE 3.84 520PP NDF LTE 3.84 Table 5 - SG A NQls During 13RFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(In)
(V)
(in) 71 29 510UL 0.15 93 l NO! LTE l 22.19 520PP I NDF LTS -1.81 62 77 51OUL 0.68 83 i NQI LTS l 0.22 520PP I NDF LTS 0.22
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 7 of 13 Table 6 - SG A NQIs During 14MCO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V)
(in) 2 l1 51UL 0.21 118INQI LTE 22.22 520PP NDF LTS -1.78 64 9
51OUL 0.31 92 NOI LTE 14.93 520PP NDF LTS -9.07 67 9
51OUL 0.21 106 NQI LTS 2.18 520PP NDF LTS 2.18 79 9
51OUL 0.18 112 NQI LTS -0.82 520PP NDF LTS -0.82 72 14 51OUL 0.18 112 NQI LTE 3.04 520PP NDF LTE 3.04 65 21 51OUL 0.3 87 NOI LTE 7.37 520PP I NDF LTE 7.37 65 21 51OUL 0.25 104 NQI LTE 5.36 520PP NDF LTE 5.36 131 28 51OUL 0.26 111 3NQ LTE 4.41 520PP NDF LTE 4.41 69 29 51OUL 0.21 136 NOI LTE 7.25 520PP NDF LTE 7.25 72 29 51OUL 0.15 105 NOI LTE 23.18 520PP NDF LTS -0.82 89 31 51OUL 0.57 102 NOI LTS 0.21 520PP NDF LTS 0.21 77 42 51OUL 0.18 106 N3I LTS -0.66 520PP INDF LTS -0.66 80 50 51OUL 3.79 20 N3I LTE 5.68 520PP NDF LTE 5.68 77 53 51OUL 6.39 19 NQI LTE 5.33 520PP NDF LTE 5.33 77 54 51OUL 19.58 19 NOI LTE 5.55 52OPP NDF LTE 5.55 61 77 51OUL 0.59 55 NOI LTS 0.02 520PP NDF LTS 0.02 62 77 51OUL 0.59 74 NQI LTS 0.22 520PP NDF LTS 0.22 77-T 93 51OUL 0.2 89 NQI LTE 3.37 520PP lNDF LTE 3.37 77 122 51OUL 0.1 109 NQI LTS
-0.8 520PP NDF LTS 0.8 The previous tables show that a number of NQI indications were called by the bobbin coil but only two of these were confirmed by the Pointm results.
The next series of tables provides the bobbin coil NQI information for SG B.
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 8 of 13 Table 7 - SG B NQls During llRFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(In)
(V)
(in) 13 3
51OUL 0.16 93 NQIO LTE 3.35 52OPP NDF LTE 3.35 45 5
51OUL 0.15 105 NQI LTE 7.52 52OPP NDF LTE 7.52 45 5
51OUL 0.25 82 NO! LTE 5.09 520PP NDF LTE 5.09 54 5
51OUL 0.25 104 NQI LTS
-1.47 52OPP NDF LTS
-1.47 85 9
51OUL 0.2 95 NQI LTS -0.48 520PP NDF LTS
-0.48 44 14 51OUL 0.17 110 NQI LTE 4.6 520PP
=
NDF LTE 4.6 80 18 51OUL 0.27 70 NOI LTE 6.32 52OPP NDF LTE 6.32 85 19 51OUL 0.16 106 NOI LTS
-0.83 52OPP NDF LTS
-0.83 86 20 51OUL 0.19 95 NOI LTE 12.82 520PP NDF LTE 12.82 41 21 51OUL 0.63 120 NOI LTE 14.57 520PP NDF LTE 14.58 45 25 51OUL 0.43 123 NOI LTE 15 520PP NDF LTE 15 90 26 51OUL 0.36 121 NQI LTE 16.97 520PP NDF LTE 16.97 40 27 51OUL 0.28 109 NOI LTE 5.7 520PP NDF LTE 5.7 45 28 51OUL 0.28 120 NOI LTE 22.43 520PP NDF LTE 22.43 113 28 51OUL 0.4 80 NQI LTE 8.07 520PP 0.96 99 MBM LTE 8.37 66 32 51OUL 0.45 111 NOI LTE 18.49 520PP NDF LTE 18.49 66 36 51OUL 0.49 121 NOI LTS -0.92 520PP NDF LTS
-0.92 80 36 51OUL 0.21 112 NQI LTE 8.33 520PP NDF LTE 8.33 43 40 51OUL 0.41 117 NOI LTS -1.38 520PP NDF LTS -1.38 100 47 51OUL 0.33 95 NO! LTE 7.81 520PP NDF LTE 7.81 14 52 51OUL 0.2 106 NQI LTS -0.36 520PP NDF LTS
-0.36 96 53 51OUL 0.38 111 NOI LTE 14.86 520PP NDF LTE 14.86 49 55 51OUL 0.37 107 NOI LTE 19.29 520PP 0.7 67 MBM LTE 19.29 61 55 51OUL 0.23 96 NOI LTS
-0.91 520PP NDF LTS
-0.91 128 63 51OUL 0.17 107 NOI LTS 5.44 520PP NDF LTS 5.44 61 64 51OUL 0.23 91 NQO LTS 0.45 520PP NDF LTS 0.45 76 70 51OUL 0.23 122 NOI LTS -1.32 520PP NDF LTS -1.32 16 76 51OUL 0.34 101 NQI LTS -0.34 520PP NDF LTS -0.34 64 79 51OUL 0.68 117 NOI LTS
-1.45 520PP NDF LTS
-1.45 69 80 51OUL 0.19 123 NQI LTS
-0.88 520PP NDF LTS
-0.88 89 80 51OUL 0.63 66 NQI LTS 0.29 520PP NDF LTS 0.29 67 81 51OUL 0.38 102 NOI LTS 0.34 520PP NDF LTS 0.34 124 86 51OUL 0.13 76 NQI LTE 9.41 520PP NDF LTE 9.41 66 87 51OUL 0.75 100 NQI LTE 15.7 520PP NDF LTE 15.7 47 88 51OUL 0.58 118 NQI LTS
-0.05 520PP NDF LTS
-0.05 66 88 51OUL 0.26 113 NOI LTS
-1.31 520PP NDF LTS
-1.31 30 89 51OUL 0.35 116 NOI LTS
-0.39 520PP NDF LTS
-0.39 38 92 51OUL 0.28 96 NQO LTS -0.37 520PP NDF LTS
-0.37 43 92 51OUL 0.41 88 NOI LTE 5.4 520PP NDF LTE 5.4 49 93 51OUL 1.04 95 NOI LTE 11.76 520PP NDF LTS 11.76 67 93 51OUL 0.27 115 NOI LTS
-0.75 520PP NDF LTS
-0.75 29 94 51OUL 0.17 104 NQI LTS
-0.4 520PP NDF LTS
-0.4 67 95 51OUL 0.3 115 NQI LTS
-0.6 520PP NDF LTS
-0.6 37 96 51OUL 0.2 126 NOI LTS -0.34 520PP NDF LTS -0.34 34 97 51OUL 0.12 116 NOI LTS
-0.5 52OPP NDF LTS
-0.5 52 97 51OUL 0.44 114 NQI LTS -1.62 520PP NDF LTE 22.38 64 97 51OUL 0.34 112 NOI LTE 22.3 520PP NDF LTE 22.3 38 98 51OUL 0.14 107 NO! LTS -0.37 520PP NDF LTS -0.37 45 102 51OUL 0.43 117 NOI LTE 22.64 52OPP NDF LTE 22.64 64 102 51OUL 0.31 93 NOI LTS
-1.02 520PP NDF LTE 22.88 47 108 51OUL 0.45 128 NQI LTE 5.85 520PP NDF LTE 5.85 77 110 51OUL 0.29 128 NOI LTE 22.37 520PP NDF LTS -1.63 54 116 51OUL 0.29 91 NOI LTE 6.12 520PP NDF LTE 6.12 70 129 51OUL 0.13 107 NQI LTS
-0.47 520PP NDF LTS
-0.47
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Attachment I Page 9 of 13 Table 8 - SG B NQIs During 12RFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V)
(in) 12 5
51OUL 0.1 68 NOI LTE 15.4 520PP NDF LTE 15.4 97 5
51OUL 0.33 112 NQI LTS -0.37 520PP NDF LTSl-0.37 49 9
51OUL 0.29 94 NQI LTE 5.08 520PP NDF LTE 5.08 80 18 51OUL 0.37 103 NQI LTE 6.17 520PP NDF LTE 6.17 135 21 51OUL 0.4 108 NQI LTS -0.06 52OPP NDF LTS -0.06 90 26 51OUL 0.25 100 NOI LTE 17.14 520PP NDF LTE 17.14 113 28 51OUL 0.37 74 NQI LTE 8.05 520PP 0.76 99 MBM LTE 7.93 79 29 51OUL 0.31 80 NQI LTE 23.58 520PP NDF LTS
-0.42 87 31 5-OUL 0.29 70 NOI LTS 1.78 520PP NDF LTS 1.78 5
38 51OUL 0.72 116 NOI LTS 5.81 520PP 1.99 93 MBM LTS 6.08 105 40 51OUL 0.26 100 NQI LTS -0.23 520PP NDF LTS -0.23 74 50 51OFN 0.14 121 NOI LTS -0.87 520PP NDF LTS
-0.87 25 51 51OUL 0.25 98 NOI LTE 22.01 520PP NDF LTS -1.99 49 55 51OUL 0.37 95 N3I LTE 19.32 520PP 0.71 71 MBM LTS
-4.68 61 55 51OUL 0.26 93 NOI LTS -0.94 520PP NDF LTS -0.94 74 56 S5OUL 0.33 88 NQI LTS -0.46 520PP NDF LTS -0.46 86 59 51OUL 0.39 86 NOI LTE 12.48 520PP NDF LTE 12.48 91 62 51OUL 0.88 87 NOI LTS 0.36 520PP
=
NDF LTS 0.36 61 63 51OUL 0.36 83 NQI LTS 0.38 520PP NDF LTS 0.38 60 64 51OUL 0.27 83 NOI LTS 0.44 520PP NDF LTS 0.44 61 64 51OUL 0.35 89 NOI LTS 0.38 520PP NDF LTS 0.38 88 64 51OUL 0.47 97 NOI LTS 0.35 520PP NDF LTS 0.41 88 65 51OUL 0.65 77 NOI LTS 0.31 520PP NDF LTS 0.31 61 66 51OUL 0.41 116 NOI LTS 0.67 520PP NDF LTS 0.67 88 66 51OUL 0.68 99 NOI LTS 0.41 520PP
=
NDF LTS 0.41 65 67 51OUL 0.32 93 NOI LTS 0.47 520PP NDF LTS 0.47 89 67 51OUL 0.55 103 NO3 LTS 0.43 520PP NDF LTS 0.43 88 68 51OUL 0.47 108 NOI LTS 0.41 520PP NDF LTS 0.41 61 70 51OUL 1.1 104 NOI LTS 0.84 520PP NDF LTS 0.84 78 70 51OUL 0.22 95 NOI LTS 0.36 520PP NDF LTS 0.36 86 70 51OUL 0.23 99 NO3 LTS 0.43 520PP
=
NDF LTS 0.43 61 71 51OUL 1.06 105 NOI LTS 0.75 520PP NDF LTS 0.75 65 71 51OUL 0.23 102 NOI LTS 1.09 520PP NDF LTS 1.09 65 71 51OUL 0.27 99 3NI LTS 0.84 520PP NDF LTS 0.84 62 72 51OUL 0.41 101 NO3 LTS 0.67 520PP NDF LTS 0.67 65 72 51OUL 0.53 98 NO3 LTS 1.29 520PP
=
NDF LTS 1.29 67 72 51OUL 0.3 115 NOI LTS 0.85 52OPP
=
NDF LTS 0.85 74 72 51OUL 0.54 111 NOI LTS 0.71 520PP
=
NDF LTS 0.71 85 72 51OUL 0.75 136 NOI LTS 0.75 520PP NDF LTS 0.75 63 73 51OUL 0.9 109 NQI LTS 0.8 520PP NDF LTS 0.8 64 73 51OUL 0.2 84 NOI LTS 1.42 520PP NDF LTS 1.42 69 73 51OUL 0.18 99 NQI LTS 0.79 520PP NDF LTS 0.79 75 73 51OUL 0.83 116 NO3 LTS 0.73 520PP NDF LTS 0.73 84 73 51OUL 0.91 119 NO3 LTS 0.84 520PP
=
NDF LTS 0.84 86 73 51OUL 0.54 112 NQI LTS 0.75 52OPP NDF LTS 0.75 68 74 51OUL 0.69 102 NOI LTS 0.58 52OPP NDF LTS 0.58 71 74 51OUL 0.18 87 NOI LTS 0.45 520PP NDF LTS 0.45 62 75 51OUL 0.58 90 NOI LTE 5.49 520PP NDF LTE 5.49 69 75 51OUL 0.5 97 NOI LTS 0.56 520PP
=
NDF LTS 0.56 70 75 51OUL 0.35 113 NOI LTS 0.58 520PP NDF LTS 0.58 71 75 51OUL 0.58 114 NQI LTS 0.62 520PP NDF LTS 0.62 89 75 51OUL 0.67 80 NQI LTS 0.37 520PP NDF LTS 0.37 70 76 51OUL 0.36 101 NQI LTS 0.67 520PP NDF LTS 0.67 71 76 51OUL 0.47 100 NQI LTS 0.65 520PP
=
NDF LTS 0.65
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 10 of 13 Table 8 - SG B NQIs During 12RFO (cont.)
BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V)
(in) 79 76 510UL 0.19 101 NOI LTS 1.23 520PP r
INDF LTS 1.23 79 76 51OUL 0.34 98 NOI LTS 0.57 520PP NDF LTS 0.57 70 77 51OUL 1.3 108 NOI LTS 1.03 520PP NDF LTS 1.03 88 77 51OUL 0.69 54 NQI LTS 0.28 520PP NDF LTS 0.28 52 78 51OUL 0.42 89 NOI LTE 7.37 520PP NDF LTE 7.37 66 78 510UL 0.93 96 NQO LTS 0.67 520PP NDF LTS 0.67 68 78 51OUL 0.47 88 NQI LTS 1.09 52OPP NDF LTS 1.09 70 78 51OUL 0.57 111 NQI LTS 1.06 52OPP INDF LTS 1.06 71 78 51OUL 0.34 98 NOI LTS 1.24 520PP INDF LTS 1.24 69 79 51OUL 0.78 99 NO! LTS 0.95 520PP
=
NDF LTS 0.95 67 80 51OUL 0.31 86 NQO LTS 0.32 520PP NDF LTS 0.32 97 85 51OUL 0.37 89 NQI LTE 22.78 520PP NDF LTE 22.78 97 87 51OUL 0.21 87 NOI LTE 22.48 520PP NDF LTE 22.48 96 89 51OUL 0.28 93 NOI LTE 6.83 520PP NDF LTE 6.83 49 93 51OUL 1.17 86 NOI LTE 11.76 520PP 3.4 89 MBM LTE 12.51 57 99 51OUL 0.34 105 NQI LTE 22.69 520PP NDF LTS -1.31 70 100 51OUL 0.27 79 NO! LTS
-0.25 520PP NDF LTS -0.25 45 101 51OUL 0.18 95 NQI LTE 22.05 520PP
=
NDF LTS -1.95 64 102 51OUL 0.24 98 NO! LTS -1.04 520PP
=
NDF LTS -1.04 98 124 51OUL 0.42 107 NQI LTS
-1.08 520PP INDF LTS -1.08 63 128 51OUL 0.13 74 NO! LTS -0.77 520PP NDF LTS -0.77 62 129 51OUL 0.34 86 NQ! LTS -0.53 520PP
=
NDF LTS -0.53 Table 9 - SG B NQls During 13RFO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH (V)
(in)
(V' (in) 114 35 51OUL 0.13 100 NQO LTE 15.14 520PP l
NDF LTS -8.86 84 37 51OUL 0.39 103 NO! LTS -0.54 520PP INDF LTS
-0.54 127 69 51OUL 0.62 135 NO! LTE 19.06 520PP I NDF LTS -4.94 61 70 51OUL 2.14 121 NQO LTS 0.93 520PP NDF LTS 0.93 73 70 51OUL 0.23 107 NOI LTE 21.33 520PP NDF LTE 21.33 75 73 51OUL 0.8 106 NOI LTS 0.62 520PP NDFJ LTS 0.62 79 76 51OUL 0.22 105 NOI LTS 1.11 52OPP I
NDFI LTSI 1.11 107 104 51OUL 0.31 103 NQI LTE 13.36 520PP NDF I LTE 13.36
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 11 of 13 Table 10 - SG B NQIs During 14MCO BOBBIN ROTATING COIL ROW TUBE PROBE VOLTS DEG IND LOC INCH PROBE VOLTS DEG IND LOC INCH
-M)
(in)
(V)
(in) 9 3
51 OUL 0.16 93 NOI LTE 22.83 520PP NDF LTS
-1.17 54 5
51OUL 0.23 111 NQI LTE 22.71 520PP NDF LTS
-1.29 46 8
51OUL 0.3 117 NOI LTE 22.95 520PP NDF LTS
-1.05 58 10 51OUL 0.2 67 NQO LTE 22.79 520PP NDF LTS
-1.21 70 13 51OUL 0.29 78 NQO LTS -0.35 520PP NDF LTS
-0.35 78 16 51OSN 0.18 60 NQI LTS -0.54 520PP NDF LTS
-0.54 46 25 51OUL 0.3 106 NQI LTE 22.77 520PP NDF LTS
-1.23 46 26 51OUL 0.22 114 NOI LTE 22.59 520PP NDF LTS
-1.41 46 29 51OUL 0.28 106 NOI LTE 22.82 520PP NDF LTS
-1.18 122 29 51OUL 0.1 118 NOI LTE 15.01 520PP NDF LTS
-8.99 42 30 51OUL 0.17 82 NOI LTS -0.86 520PP NDF LTS
-0.86 87 31 51OUL 0.33 85 NO! LTS 1.68 520PP NDF LTS 1.68 48 34 51OUL 0.18 86 NOI LTS -0.26 520PP NDF LTS
-0.26 70 34 51OUL 0.28 89 NOI LTE 6.5 520PP NDF LTE 6.5 43 40 51 OUL 0.31 125 NOI LTE 22.68 520PP NDF LTS
-1.32 26 41 51 OUL 0.22 115 NOI LTE 21.42 520PP NDF LTS
-2.58 43 41 51OUL 0.24 121 NQI LTE 21.81 520PP NDF LTS
-2.19 43 42 51OUL 0.15 131 NOI LTE 22.62 520PP NDF LTS
-1.38 67 42 51OUL 0.21 98 NQI LTE 9.68 1 520PP NDF LTE 9.68 31 44 S5OUL 0.25 84 NO! LTE 6.15 52OPP NDF LTE 6.15 69 44 51OUL 0.16 84 NQI LTE 22.51 520PP NDF LTS
-1.49 28 48 51OUL 0.19 92 NQI LTS -1.08 520PP NDF LTS
-1.08 63 48 51OUL 0.14 86 NQI LTE 22.16 520PP NDF LTS
-1.84 49 55 51OUL 0.22 95 NOI LTE 19.42 520PP NDF LTS
-4.44 10 60 51 OUL 0.23 131 NOI LTE 21.77 520PP
=
NDF LTS
-2.23 60 62 51OSN 0.23 106 NOI LTS 0.37 520PP NDF LTS 0.37 91 62 51OUL 0.5 85 NQI LTS 0.32 52OPP NDF LTS 0.32 127 69 51OUL 0.34 134 NO! LTE 19.16 52OPP
=
NDF LTS
-4.84 61 70 51OUL 0.75 108 NOI LTS 0.93 520PP I NDF LTS 0.93 64 71 51 OUL 0.59 110 NQO LTS 0.67 520PP l NDF LTS 0.67 75 71 51OUL 0.15 97 NOI LTS 0.46 520PP NDF LTS 0.46 74 72 51OUL 0.37 102 NO! LTS 0.63 520PP
=
NDF LTS 0.63 75 73 51OUL 0.55 108 NQO LTS 0.61 520PP NDF LTS 0.61 77 73 51OUL 0.22 105 NOI LTS 0.66 520PP NDF LTS 0.66 67 74 51OUL 0.4 116 NOI LTS 0.66 520PP NDF LTS 0.66 73 75 51OUL 0.34 101 NQi LTS 0.5 52OPP NDF LTS 0.5 67 76 51OUL 0.4 104 NQi LTS 0.79 520PP NDF LTS 0.79 69 76 51OUL 0.39 97 NOI LTS 0.81 520PP NDF LTS 0.81 79 76 51OUL 0.29 114 NOI LTS 0.59 520PP NDF LTS 0.59 68 77 51OUL 0.66 98 NO! LTS 0.85 520PP
=
NDF LTS 0.85 70 77 51OUL 0.51 91 NOI LTS 0.92 520PP NDF LTS 0.92 71 77 51OUL 0.35 115 NO! LTS 0.74 520PP
=
NDF LTS 0.74 72 77 51OUL 0.48 111 NO! LTS 0.79 520PP NDF LTS 0.79 80 77 S5OUL 0.49 116 NOI LTS 0.54 520PP NDF LTS 0.54 67 78 51OUL 0.39 104 NOI LTS 0.75 520PP NDF LTS 0.75 70 78 51OUL 0.48 106 NO! LTS 1.04 520PP NDF LTS 1.04 80 78 51OUL 0.3 109 NOI LTS 0.63 520PP NDF LTS 0.63 92 103 51OUL 0.16 97 NQI LTE 7.41 520PP I
NDF LTE 7.41 107 104 51OUL 0.19 97 NOI LTE 13.36 520PP NDF LTS -10.64 95 117 51OUL 0.27 111 NOI LTE 22.82 520PP
= NDF LTS
-1.18 100 118 51OUL 0.26 99 NO! LTE 22.57 520PP NDF LTS
-1.43 100 118 51OUL 0.2 98 NOI LTE 9.65 520PP NDF LTS -14.35 100 118 51OUL 0.19 86 NO! LTE 8.77 520PP NDF LTS -15.23 97 124 51OUL 0.12 85 N
LTS 0.5 520PP NDF LTS
-0.5
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 12 of 13 As with SG A, there were numerous NQIs called in SG B, but none of the NQIs were confirmed as service related degradation. There was some variability between the reported NQI calls from outage to outage due to the sludge condition, and detection probability.
Each table shows that the bobbin coil has detected a number of NQIs. However, only two of the bobbin coil indications from Table 3 through Table 10 were confirmed to be service related tube degradation by the +PointTm examination. There have been no NQIs confirmed as service-related degradation in the last two inspections.
None of the indications detected by the +PointT1l examination were missed by the bobbin coil examination. The combination of the bobbin coil and +PointThI examinations show that the degradation mode is not active in the DBNPS lower tubesheet sludge pile region. Due to the inactivity of the degradation, there are not enough indications to statistically prove the detection performance of the bobbin probe in the DBNPS LTS sludge pile region, but conversely there is no evidence that the bobbin coil detection performance has been degraded.
Question 2
- 2. Discuss if the bobbin coil technique used in the lower tubesheet region meets the industry standards. If this technique does not meet the industry standards, discuss your future plans for qualifying the inspection technique to industry standards. If this technique does not meet industry standards and you have no plans to qualify the technique to the industry standard, provide the acceptance standard, specification or criteria you are using and the technical basis for this standard, specification, or criteria to ensure the adequacy of this technique.
Response
The main bobbin coil technique qualification used in the LTS region was EPRI ETSS 96007.1 for detection of ODSCC and IGA. The technique was qualified for detection of ODSCC and IGA in non-dented drilled TSP locations and was extended for use in the LTS region. EPRI ETSS 96008.1 for detection of ODSCC in the sludge pile was applied in the sludge region.
Bobbin coil technique EPRI ETSS 96009.1 for detection of IGA in the OTSG upper tubesheet was also applied. Each technique was site validated per the requirements of the EPRI Guidelines for 13RFO and 14MCO.
Since ETSS 96007.1 was not qualified in dented locations, all dents detected by the bobbin coil examination at 2.5 Volts or greater were identified as a separate examination group. During 13RFO, a sample (approximately 60%) of the identified dents in the LTS region were examined with a +Point probe. During 14MCO all bobbin coil identified dents equal to or greater than 2.5 Volts in the LTS region were examined with a +PointP probe. No degradation was detected in any of the +PointTh' dent examinations.
Docket Number 50-346 License Number NPF-3 Serial Number 3164 Page 13 of 13 The techniques applied for the bobbin coil examination in the DBNPS LTS are industry qualified and verified for site-specific application. The 100% examination of the LTS with the industry qualified bobbin coil technique and site-specific validation significantly exceeds the requirements in the EPRI Guidelines for non-active degradation. With the potential that the bobbin coil site-specific technique validation may change over time, the DBNPS conservatively performs an additional +PointTM probe examination that also meets the sample requirements of the EPRI Guidelines by itself for a non-active degradation mechanism.
Ouestion 3.a.
3.a Considering your response to the questions above, if you conclude that full compliance with the TS in conjunction with Criteria IX, XI and XVI of 10 CFR Part 50, Appendix B, requires corrective actions, then discuss your proposed corrective actions as requested by GL 2004-01, Requested Information 2.
Response
Based on the responses provided above and the information provided in the DBNPS Generic Letter 2004-01 response, FENOC concludes that it is in full compliance with the DBNPS TS in conjunction with Criteria IX, XI and XVI of 10 CFR Part 50, Appendix B. Therefore, no corrective actions are proposed.
Ouestion 3.b 3.b Additionally, if you conclude that prior inspections were not performed consistent with the NRC position stated in GL 2004-01, then provide a safety assessment as requested by GL 2004-01, Requested Information 3.
Response
Based on the responses provided above and the information provided in the DBNPS Generic Letter 2004-01 response, FENOC concludes that prior inspections were performed consistent with the NRC position stated in GL 2004-01. Therefore, no safety assessment is provided.
Docket Number 50-346 License Number NPF-3 Serial Number 3164 COMMITMENT LIST The following list identifies those actions committed to by the Davis-Besse Nuclear Power Station (DBNPS) in this document. Any other actions discussed in the submittal represent intended or planned actions by the DBNPS. They are described only for information and are not regulatory commitments. Please notify Henry L. Hegrat, Supervisor -Licensing (330-315-6944), of any questions regarding this document or any associated regulatory commitments.
l COMMITMENTS l
DUE DATE lNone I N/A