ML12221A226

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51-9178625-000, Engineering Information Record, Attachment 1, Spring 2012 - 180 Day Steam Generator Report
ML12221A226
Person / Time
Site: Calvert Cliffs Constellation icon.png
Issue date: 07/19/2012
From: Krotke R
AREVA
To:
Office of Nuclear Reactor Regulation
References
20004-018 51-9178625-000
Download: ML12221A226 (33)
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ATTACHMENT (1)

CALVERT CLIFFS UNIT 1, SPRING 2012 -

180 DAY STEAM GENERATOR REPORT Calvert Cliffs Nuclear Power Plant, LLC August 7, 2012

A 20004-018 (10/18/2010)

ARE VA AREVA NP Inc.

ENGINEERING INFORMATION RECORD Document No.: 51 - 9178625 - 000 Calvert Cliffs Unit I - UIR21 180-Day Report Page 1 of 32

%-OJl ILI %JIIC;ULJUaUl I IC;I IL A 20004-018 (10/18/2010)

Document No.: 51-9178625-000 AR EVA Calvert Cliffs Unit I - UIR21 180-Day Report Safety Related? YES [] NO Does this document contain assumptions requiring verification? E YES NO Does this document contain Customer Required Format? LI YES NO Signature Block PILP, R/LR, PageslSections Name and A/A-CRF, PreparedlRevoewedl TitlelDiscipline Signature A/A-CRi Date Approved or Comments Randall Krotke PWq Principal Engineer DA P-N N /1 A*_ 1_ __'___i Kent Colgan . R 'k lI A d A "

Advisory Engineer 71 i1 11 ppendices Craig Kelley Supervisory Engineer(I LR -*/19?. All except for Appendices A and B Jeff Fleck W.A I, ,

Acting Technical Ie--'.I A All Manager , -. la. I Todd M. Robertson Customer C' ft Customer Review 6i2 4, All Representative __________________________

Tom Baummer Customer Customer - f All V) Review 7/Iqi . All Representative LeeWunchak .. Q. lK.UELY FL'- Customer Verification that customer supplied Project Manager OUtJW jI A Reference ./i reference material is approved for Approver use on this contract. See Notel at

..... .... __ _______ end of Reference section.

Note: P/LP designates Preparer (P), Lead Preparer (LP)

R/1LR designates Reviewer (R), Lead Reviewer (LR)

A/A-CRF desigtes ApprOvr (A), Approver ofCustmr Requested Format (A-CRF)

A/A-CRI designates Approver (A), Approver - Confirming Reviewer independence (A-CRI)

Page 2

A 20004-018 (10/18/2010)

Document No.: 51-9178625-000 AREVA Calvert Cliffs Unit 1 - U1R21 180-Day Report Record of Revision Revision PageslSectionsl No. Paragraphs Changed Brief Description I Change Authorization 000 All Original issue Page 3

A Document No.: 51-9178625-000 AR EVA Calvert Cliffs Unit 1 - UIR21 180-Day Report Table of Contents Page SIG NATURE BLO CK ................................................................................................................................ 2 RECO RD O F REVISIO N .......................................................................................................................... 3 LIST O F TABLES ..................................................................................................................................... 5 LIST O F FIG URES ................................................................................................................................... 6 1.0 180-DAY REPO RT ........................................................................................................................ 7

2.0 REFERENCES

............................................................................................................................ 20 APPENDIX A : SG11 FBW INDICATIONS .............................................................................................. 21 APPENDIX B : SG12 FBW INDICATIONS ...................................................................................................... 26 Page 4

A Document No.: 51-9178625-000 AREVA Calvert Cliffs Unit 1 - Ul R21 180-Day Report List of Tables Page TABLE 1 - NDE TECHNIQUES UTILIZED FOR IDENTIFIED DEGRADATION ................................ 9 TABLE 2 - LATTICE SUPPO RT WEAR .............................................................................................. 11 TABLE 3 - FOREIG N O BJECT WEAR ............................................................................................. 15 TABLE 4- LIST OF TUBES PLUGGED DURING U1 R21 ................................................................ 16 TABLE 5 - TUBE PLUGG ING SUM MARY ......................................................................................... 16 Page 5

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UlR21 180-Day Report List of Figures Page FIGURE 1 - FAN BAR WEAR THROUGHWALL DEPTH DISTRIBUTION ....................................... 12 FIGURE 2 - SG1 1 FAN BAR W EAR LOCATIONS ........................................................................... 13 FIGURE 3 - SG12 FAN BAR WEAR LOCATIONS ........................................................................... 13 FIGURE 4 - SG1 1 FAN BAR WEAR CONDITION MONITORING .................................................... 18 FIGURE 5 - SG12 FAN BAR WEAR CONDITION MONITORING .................................................... 18 FIGURE 6 - SG1 1 AND 12 LATTICE SUPPORT WEAR CONDITION MONITORING ..................... 19 FIGURE 7- SG1 1 AND SG12 LOOSE PART WEAR CONDITION MONITORING .......................... 19 Page 6

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report 1.0 180-DAY REPORT Calvert Cliffs Nuclear Power Plant Unit I U1R21 Spring 2012 Steam Generator Inspection During the Calvert Cliffs Nuclear Power Plant Unit 1 (CCNPP1) spring 2012 refueling outage (designated as UIR21), both of the steam generators (i.e., SG11 and SG12) were inspected in accordance with CCNPP Technical Specification (TS) 5.5.9, Reference 6. This was the third in-service inspection of the replacement steam generators (SGs), and the SGs had been operated for 9.104 effective full power years (EFPY) at the time of the inspection.

The discussion below summarizes the results of the inspection in accordance with the 180-day reporting requirements of Reference 6. Bold wording restates the TS requirement, followed immediately by the required CCNPP1 information.

A report shall be submitted within 180 days after the initial entry into Mode 4 following completion of an inspection performed in accordance with the Specification 5.5.9, Steam Generator (SG) Program.

Initial entry into Mode 4 occurred on April 6, 2012; therefore, based on this date, this report is required to be submitted by October 3, 2012.

The report shall include:

a. The scope of inspections performed on each SG
  • Eddy Current Bobbin probe examinations (both SGs):

o 100% of all in-service tubes, full length, tube end to tube end.

o During the bobbin probe examination, in-service tubes bounding plugged tubes were examined for signs of tube-to-tube proximity or contact (resulting from severance of a plugged tube).

  • Eddy Current X-probe (Array) examinations (both SGs):
  • 100% of all in-service tubes, tube end to 1 st lattice-support (both H/L and C/L).

o Since 100% of the in-service tubes were examined with X-probe from TTS-3" to 1 st lattice support on both H/L and C/L sides, these examinations satisfy the requirement to bound (one tube deep) all indications of foreign objects and volumetric degradation that could have been caused by the foreign object- provided the location of interest (elevation) was captured by the X-probe examination range. Some of the noteworthy objects that have been previously detected include flexatalic gasket, wire-like mesh and wire.

Page 7

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit I - U1R21 180-Day Report o The Array probe inspection data was also analyzed for expansion transition cracking at the hot and cold leg top of tubesheet (TTS)

Rotating Eddy Current +PT probe examinations (RPC) (both SGs):

o Pre-planned: Inspection of all in-service tube locations containing previously identified foreign object wear. This included 1 tube in SGII1 (reported for the first time during U1R18) and, 1 tube in SG12 (reported for the first time during U R118).

o Special interest examinations:

  • All bobbin probe and/or Array probe I-Codes.
  • Six previous foreign-object related tube locations flagged for examination.
  • All newly-identified foreign object wear indications.
  • All bobbin probe loose part indications plus a one tube bounding examination of such tubes that fall outside of the Array probe examination range.
  • All bobbin probe lattice-support wear indications.
  • Additional indications (e.g., fan bar wear, dents, dings) as needed to meet operational assessment requirements for tube integrity.
  • All foreign object locations identified by secondary side visual inspection.

" Visual inspection of all installed tube plugs in both SGs in accordance with section 6.9 of the EPRI PWR Steam Generator Examination Guidelines, Rev 7 (Reference 5). This included 1 mechanical plug.

  • The following secondary side inspections were performed (both SGs):

Pre-upper Bundle Flush (UBF) TTS Visual Inspections:

o Visual inspection of the no-tube lane and staywell region, and retrieval of foreign objects with the potential to cause tube damage, if identified o Three inner bundle inspection passes in each leg from the no-tube lane o One inner bundle inspection pass from the hot leg handhole to access the kidney region o During inner bundle inspections an attempt will be made to retrieve collar and/or scale samples for chemical analysis UBF and TTS Water Lancing Post Lancing TTS Visual Inspections:

o Visual examination of the annulus, no tube lane, and staywell regions o Three inner bundle inspection passes in each leg from the no-tube lane. The same three inner bundle passes that were performed during the pre UBF TTS visual inspections. This pre and post inspection was perfrormed to assess the effectiveness of the waterlancing evolution.

O Exam includes views into the tube bundle 3 to 5 tubes deep O Exam includes views upward to the 1 st lattice support o Retrieve foreign objects as possible and necessary with concurrence of cognizant Constellation representative Page 8

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report Upper Internals Visual Inspections:

o Secondary separator area including steam nozzle venturis, secondary deck seal skirt, secondary deck structures, and secondary separator top surfaces o Secondary separator ID including outlet ports, vent holes, skimmer vanes, inlet vanes, and drain tubes o Primary separator ID including upper can vent holes and rim, flow arms, and riser pipe IDto primary deck attachment o Primary separator OD including drain tube attachments and riser tube OD to deck joint area o Primary deck structures including ladders and supports, primary deck surfaces, manway cover and fasteners, aux feedwater header, main feedwater gooseneck piping, and deck to shell attachment o Lower steam drum and top of tube bundle region including tube bundle support structures (i.e., fan bars, top lattice rim and lattice bar ends, fan bar restraints), tube surfaces, J-tabs, tube to J-tab contacts o Feedwater annulus region including primary deck to shell attachments, feedring support brackets, shroud pins, shroud slip joint, downcomer entrance, gooseneck attachment point, header pipe, J-tubes, J-tube header welds, and J-tube ID

b. Active degradation mechanisms found Three degradation mechanisms were identified during this examination: 1) fan bar wear, 2) lattice grid support wear and 3) foreign object wear. No evidence of corrosion degradation processes, or cracking was identified and no tubes were identified as being in close proximity to one another.
c. Nondestructive examination techniques utilized for each degradation mechanism The table below identifies NDE examination techniques utilized for each identified degradation mechanism.

Table 1 - NDE Techniques Utilized for Identified Degradation Degradation Inspection Type EPRI ETSS Mechanism Bobbin 96004.1 (Rev. 13)

+PointTM 96910.1 (Rev. 10)

Bobbin 96004.1 (Rev. 13)

Lattice supp wear +PointM 96910.1 (Rev. 10)

Foreign Object +PointTm 27901.1 (Rev. 0) **

Wear* (circ groove)

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A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report

  • The Array probe was the primary means of detecting foreign objects and foreign object wear during the inspection. However, the +PointTM probe was used for sizing wear and confirming foreign objects.
    • There are other EPRI techniques qualified for sizing of foreign object wear depending on the shape of the flaw. ETSS 27901.1 was selected based on the circumferential groove appearance of the foreign object wear indications detected during the U1R21 inspection.
d. Location, orientation (if linear), and measured sizes (if available) of service induced indications Fan bar wear (FBW) is a mechanical degradation process which produces volumetric tube wear at the interface between the U-bend anti-vibration supports (fan bars) and the tubes. In total, 465 fan bar wear (FBW) indications in 378 tubes were identified in the CCNPP1 steam generators during the U1IR21 inspection. Although none of the reported indications exceeded the Technical Specification plugging limit of 40%TW, the largest FBW indication (33% in SG12, R53 C105) was preventatively stabilized with a 570-inch length stabilizer, and the tube was plugged.

143 of the 465 indications were newly reported during UIR21. This represents an increase of about 44% since the last in-service inspection in 2008 (UIR18). The maximum depth reported was a 33%TW indication in SG12. This also was a newly reported indication and the tube was removed from service.

Figure 1 provides the distribution of fan bar wear depths for both steam generators as reported with the bobbin coil probe. As shown in the figure, SG12 contained more indications and also contained the majority of indications that were greater than 20%TW.

Figures 2 and 3 provide tube map locations of the reported FBW from both UI R1 8 (2008) and U1 R21.

Although the tube maps shown in Figures 2 and 3 provide a view of the tubesheet primary face from the hot leg side, both the hot leg and cold leg FBW indications are included on each map. Most of the wear continues to occur in longer tubes (i.e., larger ubend radius), clustered towards the center-most tube columns.

Lattice support wear (LSW) is a mechanical degradation process which produces volumetric tube wear at the interface between the lattice support grids and the tubes. In total, four LSW indications in four tubes were identified in the CCNPP1 steam generators during the U1 R21 inspection. Only 1 of the 4 were newly reported during U1R21. The previously reported indications showed little to no growth.

Table 2 provides a summary of the LSW indications.

Page 10

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report Table 2 - Lattice Support Wear 2008 2012 Eddy Measured Length Loose Part SG Row Col Ind Depth Depth Location Current

(%TW) (%TW) Techniques (in.) Axial x Circ Detected 11 78 94 WAR 11 12 04H+0.54" 96910.1/ 0.26 x 0.30 No 96004.1 12 18 152 WAR ---- 7 03H-1.83" 96910.1/ 0.27 x 0.35 No 96004.1 12 122 86 WAR 9 11 07C+1.16" 96910.1/ 0.11 x 0.25 No 96004.1 12 134 88 WAR 14 12 02H-1.46" 96910.1/ 0.32 x 0.35 No 96004.1 Page 11

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report Figure 1 - Fan Bar Wear Throughwall Depth Distribution CCNPP UIR21 2012 %TW Distributions 100 -

90 SG12 80 -WG 701 C

a 60 50 40

' 30 20 10 0 >2 to >4 to >6 to >8101to>12 to>14to>16to>18to>2to >22 to >24 to >26 to >28 to >30 to >32 to >40

<=264 <=6 8< =10 <=12 <=14 <=16 <=18 <=20 <=22 <=24 <=26 <=28 <-30<- 32 =34 0 1 11 64 1 59 37 13 11 3 3 0 1 0 0 0 0 0 0 FSG12 0 1 26 77 89 33 22 8 2 0 1 1 1 0 0 0 1 0 Measured Wear Depth (%TW)

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A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report Figure 2 - SGI I Fan Bar Wear Locations Calvert Cliffs 1R21 02 FO 203,IU SG11 FBW Indications

  • It 1DTA*IlUES Stll HO EEC1ThElM3 WA __

FOUT OF WI "A il NOZZLE Figure 3- SG12 Fan Bar Wear Locations Calvert Ciffs 1R21 2012Fe2. ,21 SG12 FBW Indications HOT 21 Z.ClOTE

  • ARV FACE OUTOB O 1K WI NA -

NOZZLE SO W 5 IS 5 *

  • a Page 13

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report During the U1R21 inspection, 7 indications of foreign object wear were detected in 7 tubes within the two SGs (see Table ). These indications were reported as LPW (Loose Part Wear) in the eddy current database. One indication was newly-detected in SGI 1 and four were newly-detected in SG 12 during UIR21. The remaining (one) indication in SG11, and (one) indication in SG12, were identified during prior inspections, and were pre-planned for re-inspection during U1R21. All LPW indications were sized below the site plugging limit. None of the foreign objects that caused the newly-detected LPW in 2012 was present at the LPW tube location. Nor were objects present at non-plugged LPW tube locations from previous outages. Since no objects were present to cause further wear and all LPW

%TWs were less than the 40% tech spec plugging limit, all 7 tubes were returned to service.

Due to the previous foreign objects experience at CCNPP, a concerted effort was undertaken during U1R21 to detect and remove as many foreign objects as possible. A 100% examination of both SGs was performed with the Array probe from the tube end to the first support in each leg. This provided the most thorough inspection possible for detection of foreign objects from the tubesheet up to the first support in both legs. As a result, 108 Potential Loose Part (PLP) indications were reported in SG1 1, and 259 were recorded in SG12. It should be noted that these quantities represent the initial number of PLP indications in the ECT database. Each of these locations received a +PT examination and most were resolved as NDF. The number of +PT confirmed PLP indications were 17 in SG1 1 and 7 in SG12.

Upon visually inspecting a location, the indication code was subsequently changed to LPS (Loose Parts Signal) if no loose part was found by visual inspection, LPR (Loose Part Removed) if any object (including a sludge rock) was found and removed from the SG, or VLP (Visual Loose Part) if any object was visually confirmed to be present but not removed from the SG. Thus the stated quantities are actually the sum of PLP, LPS, LPR, and VLP calls remaining in the database.

With certain justified exceptions (Refs. 1 and 2), all PLP indications were visually investigated by secondary side inspection personnel. This included loose parts left in service from the previous (2008) inspection. PLP locations that were not visually inspected were justified by a separate engineering evaluation. The evaluation divided the bundle into two parts: the 12-tube periphery ring and all tubes bounded by the periphery ring, (i.e., the inner bundle region). PLP indications located within the inner bundle region were further divided into two classifications, IBS (inner bundle single) and all other. IBS indications are defined as PLP indications located in a single tube without a PLP indication in an adjacent bounding tube. Since IBS indications were judged to be less of a concern regarding tube integrity, (compared to two or more adjacent PLP tubes), visual inspection of IBS tubes was not required. Of the 17 confirmed PLP indications detected in SG11, 8 of them were classified as IBS indications. Accordingly, of the 7 confirmed PLP indications detected in SG12, 1 of them was classified as an IBS indication. Several metallic objects were removed and a few small foreign objects were left in SG11 (see CR2012-1619) and SG12 (se CR2012-1622) secondary side. In total 16 objects are removed from the Unit 1 SGs during 1R21 (12 in SG11 and 4 in SG12).

Page 14

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1 R21 180-Day Report Table 3 - Foreign Object Wear 2008 2012 Eddy Measured Length Loose SG Row Col Ind Depth Depth Location Current .) Axi x Part

(%TW) (%TW) Technique (in., ia x rc Detected 11 113 113 LPW -- 25 TSH+0.51" 27901.1 0.29 x 0.33 Yes 11 126 114 LPW 20 19 TSH+0.99" 27901.1 0.21 x 0.25 No 12 22 70 LPW -- 23 TSC+0.20" 27901.1 0.24 x 0.28 No 12 106 134 LPW 24 25 TSH+7.26" 27901.1 0.27 x0.33 No 12 116 44 LPW -- 24 TSC+0.40" 27901.1 0.24 x 0.33 No 12 117 45 LPW -- 21 TSC+0.30" 27901.1 0.21 x 0.33 No 12 136 86 LPW -- 26 TSC+8.64" 27901.1 0.27 x 0.35 Yes Page 15

A ARE VA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report

e. Number of tubes plugged during the inspection outage for each active degradation mechanism One tube in SGI2 was plugged during UIR21 (see Table ). This tube was preventatively stabilized and plugged due to Fan Bar wear. The tubes are labeled as TBP (To Be Plugged) in the ECT database.

No tubes were plugged in SG1 1 during the 2012 refueling outage.

Table 4 - List of Tubes Plugged During UI R21 Hot Leg Cold Leg Reason for Tube Repair ROLLED ROLLSTAB TWD@F07-0.94 TBP = Preventative Tube Plug ROLLSTAB=Stabilizer and Rolled Plug

f. Total number and percentage of tubes plugged to date Table provides the post-U1R21 tube plugging status of the CCNPPI SGs. There are currently 1 tube plugged in SG1 1 and 1 tube plugged in SGI2.

Table 5 - Tube Plugging Summary SG Tubes Installed Tubes Plugged To-Date SG11 8,471 1(0.01%)

SG12 8,471 1(0.01%)

Total 16,942 2(0.01%)

Page 16

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report

g. The results of condition monitoring, including the results of tube pulls and in-situ testing The condition monitoring assessment is summarized in Figures 4 through 7. These figures provide the condition monitoring limit curves corresponding to the NDE technique employed for each degradation type. All reported degradation falls below the applicable condition monitoring curve and therefore satisfies the Technical Specification structural performance criteria.

Note that Figures 4 and 5 display the U1 R21 FBW depths at a bounding 1.8 inch length for SGs 11 and 12 respectively. Also presented in each figure are the seven deepest FBW indications sized using RPC. The five deepest were selected since larger axial lengths are typically associated with deeper FBW. The measured RPC length for these indications is plotted to demonstrate that the 1.8 inch length remains bounding. Because the RPC length measurements were not adjusted to compensate for rotating coil field spread effects, the indicated length values are considered to be overestimates of the actual lengths, thus adding to the conservatism for the 1.8 inch bounding length.

For volumetric indications, meeting the structural performance criteria also provides reasonable assurance that the accident leakage performance criteria would be satisfied at the steam line break pressure differential which is less challenging than the pressure differential required to demonstrate compliance with the structural performance criteria. Since this conclusion could be reached analytically using NDE inspection results with a full accounting of significant uncertainties, no in-situ pressure testing was required to demonstrate structural and leakage integrity, and no tubes were removed from the SGs for destructive examination. During the past operating cycle, no measurable primary-to-secondary leakage was observed, therefore the operational leakage performance criteria was satisfied.

The results of the 2012 inspection and the condition monitoring assessment confirm that the 2008 operational assessment was appropriately bounding.

h. The effective plugging percentage for all plugging in each SG There are no sleeves installed in the CCNPP1 steam generators, therefore the effective plugging percentage is the same as stated in (f) above.

Page 17

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report Figure 4 - SGI I Fan Bar Wear Condition Monitoring 100

-CM Limit - ETSS 96004.1 90

  • Wear Depth - 1.8 in. Bounding Length 80 1 A Wear Depth - Measured Length 70 60 0.

C C

50 40 a

a 4) 30 A

20 10 A AI 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Axial Length (in)

Figure 5 - SG12 Fan Bar Wear Condition Monitoring 100 90 - CM Limit- ETSS 96004.1

  • Wear Depth - Assumed Bounding Length 80 A Wear Depth - Measured Length 0

70 60 0.

4) 0 50 0

40 a A 4) 30 A

20 A #

10 A 0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Axial Length (in)

Page 18

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report Figure 6 - SGI I and 12 Lattice Support Wear Condition Monitoring so

- --04 Um1 ErFSS96910.1 Lergth aiid 96004.1 *TW 70 0 SGII2LaIS1 Support YV~

60 20 A

0-0.0 02 0.4 0.6 0.8 0.0 1.2 1.4 1.6 1.0 2.0 AwedLenot (in)

Figure 7- SGII and SGI2 Loose Part Wear Condition Monitoring 90.000 40.00- - - - - - --- -- -- -- -- --

50.000

-04 LIMs ETSS 2701.0I 0 SGII Looswept ~W

  • 40.00 SGI2 LIO pat ~AW

.090 10.000 0.000 0.0 0.2 0.4 0.6 0.1 0.0 1.2 1.4 1.6 1A. 2.0 Axiol Length (on)

Page 19

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report

2.0 REFERENCES

1. AREVA Condition Report 2012-1619: Disposition of Loose Parts in 11 SG, CCNPP Unit 1
2. AREVA Condition Report 2012-1622: Disposition of Loose Parts in 12 SG, CCNPP Unit 1
3. AREVA Document 51-9178583-000, "Calvert Cliffs Nuclear Power Plant Unit 1, Steam Generator Condition Monitoring and Operational Assessment, Spring 2012 / EOC20", March 2012
4. AREVA Document 51-9174684-001, "Calvert Cliffs Nuclear Power Plant Unit 1, Steam Generator Degradation Assessment, Spring 2012 / EOC20," February 2012
5. EPRI Guideline, "Steam Generator Management Program: Pressurized Water Reactor Steam Generator Examination Guidelines: Revision 7", 1013706, October 2007
6. CCNP Technical Specification 5.5.9.b.2 (See Note 1)

Notes:

1. This reference is not available from the AREVA NP records center; however, it is available from the Constellation Energy Group (CENG) document control system. Therefore, this is an acceptable reference for use on this contract per AREVA NP Procedure 0402-01, Attachment 8 as authorized by the PM signature on page 2.

Page 20

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report APPENDIXA: SG11 FBWINDICATIONS SG RW COL IND LOCATION VOLTS DEG CHN 2012%TW' 11 117 79 TWD F06 -0.67 0.47 131 P3 23 11 105 89 TWD F07 +0.76 0.36 135 P3 20 11 107 83 TWD F07 -0.54 0.37 122 P3 20 11 120 82 TWD F06 +1.74 0.34 113 P3 19 11 104 82 TWD F07 +0.89 0.32 137 P3 18 11 105 79 TWD F07 +1.89 0.32 130 P3 18 11 95 75 TWD F07 +1.93 0.28 89 P3 17 11 101 83 TWD F07 -0.48 0.26 112 P3 16 11 112 78 TWD F07 +0.87 0.27 126 P3 16 11 113 79 TWD F06 -0.74 0.28 130 P3 16 11 40 134 TWD F07 +0.98 0.25 120 P3 15 11 61 125 TWD F07 +1.93 0.25 111 P3 15 11 88 86 TWD F07 +1.72 0.24 136 P3 15 11 91 81 TWD F07 -1.30 0.25 118 P3 15 11 98 74 TWD F07 +0.86 0.24 100 P3 15 11 103 79 TWD F07 +1.95 0.24 115 P3 15 11 104 80 TWD F07 +0.89 0.24 123 P3 15 11 114 78 TWD F07 +0.87 0.24 117 P3 15 11 102 86 TWD F07 +1.77 0.21 104 P3 14 11 106 86 TWD F07 +1.77 0.23 129 P3 14 11 114 82 TWD F07 +0.95 0.22 104 P3 14 11 117 79 TWD F07 +1.96 0.23 132 P3 14 11 57 89 TWD F08 +1.54 0.21 115 P3 13 11 90 84 TWD F10 -0.73 0.2 114 P3 13 11 92 78 TWD F07 +0.89 0.2 134 P3 13 11 100 78 TWD F06 -1.76 0.21 113 P3 13 11 101 75 TWD F07 +1.91 0.19 130 P3 13 11 101 79 TWD F06 -0.69 0.19 92 P3 13 11 110 78 TWD F06 -1.69 0.21 129 P3 13 11 111 79 TWD F09 +1.32 0.2 110 P3 13 11 111 87 TWD F07 +0.67 0.2 119 P3 13 11 58 82 TWD F07 +1.80 0.19 113 P3 12 11 87 75 TWD F07 +1.93 0.17 105 P3 12 11 95 83 TWD F07 -0.50 0.19 113 P3 12 11 99 75 TWD F07 +1.80 0.19 76 P3 12 11 100 90 TWD F07 +1.73 0.17 124 P3 12 11 101 87 TWD F06 -1.71 0.19 138 P3 12 11 105 85 TWD F07 +0.69 0.17 105 P3 12 11 106 78 TWD F07 +0.89 0.19 115 P3 12 Page 21

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report SG RO7 OL IND LOCATION VOLTS DEG C1 2012%TW 11 107 79 TWD F07 -1.78 0.17 114 P3 12 11 107 87 TWD F06 -1.65 0.18 97 P3 12 11 109 87 TWD F06 +1.52 0.18 131 P3 12 11 113 83 TWD F07 -0.43 0.18 111 P3 12 11 116 86 TWD F07 +1.74 0.19 152 P3 12 11 117 87 TWD F07 +0.65 0.19 139 P3 12 11 68 84 TWD F06 -0.65 0.17 136 P3 11 11 69 79 TWD F07 -0.80 0.16 101 P3 11 11 72 86 TWD F07 +1.34 0.16 130 P3 11 11 76 86 TWD F07 +1.80 0.17 94 P3 11 11 83 87 TWD F07 +1.34 0.17 117 P3 11 11 87 79 TWD F07 +1.95 0.16 100 P3 11 11 96 80 TWD F06 -1.73 0.16 131 P3 11 11 98 82 TWD F08 +2.03 0.17 106 P3 11 11 99 79 TWD F07 +1.88 0.16 110 P3 11 11 99 89 TWD F07 +0.78 0.17 126 P3 11 11 101 79 TWD F07 +1.91 0.16 98 P3 11 11 103 75 TWD F07 +1.91 0.16 94 P3 11 11 103 79 TWD F06 -0.72 0.16 59 P3 11 11 104 88 TWD F06 -0.88 0.17 123 P3 11 11 106 82 TWD F07 +0.89 0.16 117 P3 11 11 107 89 TWD F07 +0.65 0.17 136 P3 11 11 109 83 TWD F08 -0.52 0.16 100 P3 11 11 109 83 TWD F07 +0.54 0.17 123 P3 11 11 112 80 TWD F06 +1.89 0.17 134 P3 11 11 113 87 TWD F07 +0.65 0.17 155 P3 11 11 115 87 TWD F07 +0.72 0.17 117 P3 11 11 116 86 TWD F06 -0.78 0.16 121 P3 11 11 121 55 TWD F07 +0.65 0.16 77 P3 11 11 83 79 TWD F07 +1.95 0.14 69 P3 10 11 84 86 TWD F07 -1.86 0.15 148 P3 10 11 92 74 TWD F07 +0.78 0.14 146 P3 10 11 92 96 TWD F06 +0.75 0.15 118 P3 10 11 93 83 TWD F07 -0.43 0.15 114 P3 10 11 94 82 TWD F07 +0.91 0.15 83 P3 10 11 96 82 TWD F07 +0.89 0.14 141 P3 10 11 97 65 TWD F07 +0.74 0.14 59 P3 10 11 97 75 TWD F07 +1.84 0.15 106 P3 10 11 98 90 TWD F07 +1.70 0.14 113 P3 10 11 99 83 TWD F06 +0.80 0.14 95 P3 10 11 101 87 TWD F07 +0.69 0.15 138 P3 10 11 103 83 TWD F06 +0.63 0.15 94 P3 10 11 106 80 TWD F08 -0.80 0.14 75 P3 10 Page 22

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report SG ROW CO IN4D LOCATION VOLTS DEG CHN 2012%TW 11 106 88 TWD F08 -0.83 0.15 136 P3 10 11 107 85 TWD F07 +0.74 0.15 67 P3 10 11 110 76 TWD F07 +0.87 0.14 117 P3 10 11 110 78 TWD F07 +0.89 0.14 115 P3 10 11 113 89 TWD F07 +0.74 0.15 152 P3 10 11 114 76 TWD F07 +0.87 0.14 97 P3 10 11 115 87 TWD F06 -1.70 0.14 135 P3 10 11 116 72 TWD F06 +1.77 0.14 116 P3 10 11 118 78 TWD F06 -1.71 0.14 105 P3 10 11 121 83 TWD F06 +0.43 0.14 90 P3 10 11 127 81 TWD F06 -1.34 0.14 117 P3 10 11 80 86 TWD F07 +1.78 0.14 123 P3 9 11 85 69 TWD F07 +1.87 0.13 103 P3 9 11 87 83 TWD F05 +0.57 0.13 88 P3 9 11 89 81 TWD F07 +1.93 0.12 121 P3 9 11 89 83 TWD F06 +0.55 0.13 93 P3 9 11 89 105 TWD F03 -0.09 0.13 100 P3 9 11 92 78 TWD F06 -1.74 0.13 118 P3 9 11 92 78 TWD F08 +1.98 0.13 131 P3 9 11 92 88 TWD F08 -1.89 0.12 141 P3 9 11 93 69 TWD F08 +0.82 0.13 112 P3 9 11 94 74 TWD F07 +0.84 0.13 105 P3 9 11 94 76 TWD F07 +0.89 0.13 100 P3 9 11 96 92 TWD F06 -1.15 0.12 95 P3 9 11 97 81 TWD F07 -0.78 0.12 114 P3 9 11 98 80 TWD F07 +0.89 0.13 122 P3 9 11 100 80 TWD F08 +0.91 0.13 131 P3 9 11 104 82 TWD F06 -1.64 0.14 132 P3 9 11 105 75 TWD F07 +1.78 0.13 136 P3 9 11 106 80 TWD F07 +0.87 0.13 77 P3 9 11 108 84 TWD F07 +1.91 0.13 126 P3 9 11 108 88 TWD F06 -0.85 0.13 112 P3 9 11 109 83 TWD F06 +0.56 0.14 125 P3 9 11 109 85 TWD F06 +0.71 0.12 162 P3 9 11 109 89 TWD F07 +0.67 0.13 139 P3 9 11 112 76 TWD F07 +0.96 0.13 143 P3 9 11 113 85 TWD F07 +0.76 0.12 158 P3 9 11 114 80 TWD F07 +0.91 0.13 143 P3 9 11 116 78 TWD F07 +0.91 0.13 121 P3 9 11 119 83 TWD F07 -0.41 0.12 101 P3 9 11 120 88 TWD F07 +1.58 0.12 139 P3 9 11 120 88 TWD F06 -0.85 0.12 136 P3 9 11 120 90 TWD F06 +1.76 0.13 128 P3 9 Page 23

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report 11 125 93 TWD F07 +1.98 0.13 122 P3 9 11 127 91 TWD F09 +1.77 0.13 132 P3 9 11 60 68 TWD F07 +0.93 0.11 150 P3 8 11 68 54 TWD F07 -1.06 0.12 123 P3 8 11 68 78 TWD F06 -1.45 0.12 109 P3 8 11 78 84 TWD F08 +0.95 0.11 119 P3 8 11 85 73 TWD F07 -1.79 0.12 121 P3 8 11 85 81 TWD F06 -0.70 0.11 97 P3 8 11 86 80 TWD F09 +0.91 0.11 142 P3 8 11 87 79 TWD F08 +0.84 0.11 135 P3 8 11 88 84 TWD F08 +1.09 0.11 108 P3 8 11 89 69 TWD F07 +1.91 0.11 114 P3 8 11 89 89 TWD F07 +0.82 0.11 142 P3 8 11 91 95 TWD F07 -0.94 0.1 90 P3 8 11 96 80 TWD F06 -0.76 0.12 143 P3 8 11 96 86 TWD F07 -1.08 0.12 109 P3 8 11 98 82 TWD F07 +1.02 0.12 84 P3 8 11 99 85 TWD F06 +1.78 0.11 70 P3 8 11 100 82 TWD F06 +0.78 0.11 141 P3 8 11 100 96 TWD FIll -0.89 0.11 81 P3 8 11 101 89 TWD F07 +0.69 0.1 130 P3 8 11 102 78 TWD F06 -1.67 0.12 96 P3 8 11 102 80 TWD F08 +0.89 0.11 75 P3 8 11 106 78 TWD F06 -1.73 0.11 146 P3 8 11 108 84 TWD F06 -0.87 0.11 149 P3 8 11 109 79 TWD F06 -0.74 0.12 104 P3 8 11 111 89 TWD F07 +0.72 0.12 127 P3 8 11 114 74 TWD F06 -1.75 0.12 90 P3 8 11 115 75 TWD F07 +1.87 0.11 119 P3 8 11 115 79 TWD F06 -0.67 0.12 109 P3 8 11 115 91 TWD F07 +0.89 0.11 135 P3 8 11 117 83 TWD F07 -0.48 0.12 76 P3 8 11 120 82 TWD F04 +1.06 0.11 137 P3 8 11 121 79 TWD F07 +1.74 0.12 121 P3 8 11 123 83 TWD F06 -0.48 0.11 130 P3 8 11 124 88 TWD F08 +0.54 0.11 124 P3 8 11 127 91 TWD F06 +0.95 0.11 148 P3 8 11 33 83 TWD F07 +0.00 0.09 32 P3 7 11 77 69 TWD F08 +0.82 0.1 94 P3 7 11 83 79 TWD F08 +0.93 0.1 127 P3 7 11 84 86 TWD F07 +1.78 0.1 23 P3 7 11 89 69 TWD F08 +0.74 0.1 94 P3 7 11 92 76 TWD F07 +0.83 0.09 114 P3 7 Page 24

A ARE VA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report 11 94 84 TWD F08 +0.92 0.1 106 P3 7 11 95 85 TWD F07 +0.83 0.09 117 P3 7 11 97 79 TWD F07 +1.98 0.09 119 P3 7 11 97 83 TWD F07 -0.50 0.1 93 P3 7 11 99 83 TWD F08 +0.60 0.1 72 P3 7 11 100 84 TWD F08 +0.89 0.09 73 P3 7 11 100 86 TWD F08 -0.89 0.1 137 P3 7 11 101 85 TWD F07 +0.83 0.1 144 P3 7 11 101 87 TWD F09 -0.82 0.09 137 P3 7 11 102 84 TWD F06 -0.80 0.1 109 P3 7 11 102 84 TWD F07 +1.91 0.1 124 P3 7 11 103 81 TWD F07 -1.86 0.1 97 P3 7 11 103 83 TWD F07 -0.45 0.1 121 P3 7 11 105 79 TWD F06 -0.74 0.1 153 P3 7 11 105 83 TWD F07 -0.37 0.09 104 P3 7 11 105 109 TWD F09 +0.70 0.1 155 P3 7 11 116 106 TWD F07 -1.59 0.1 163 P3 7 11 117 99 TWD F06 +0.80 0.1 97 P3 7 11 118 78 TWD F07 +0.89 0.1 145 P3 7 11 123 81 TWD F07 +1.95 0.1 137 P3 7 11 125 103 TWD F09 +0.59 0.1 108 P3 7 11 128 88 TWD F06 +1.70 0.09 117 P3 7 11 133 103 TWD F07 +0.71 0.1 153 P3 7 11 80 86 TWD F08 +0.83 0.08 128 P3 6 11 83 69 TWD F08 +0.82 0.09 128 P3 6 11 84 78 TWD F05 -0.76 0.08 133 P3 6 11 88 84 TWD F07 +2.05 0.09 51 P3 6 11 96 74 TWD F07 +0.89 0.09 129 P3 6 11 97 83 TWD F06 -0.46 0.08 126 P3 6 11 99 85 TWD F06 +0.74 0.09 72 P3 6 11 100 84 TWD F07 +2.05 0.08 120 P3 6 11 115 85 TWD F07 +0.76 0.08 73 P3 6 11 125 81 TWD F08 +0.85 0.08 133 P3 6 11 108 78 TWD F08 -1.19 0.06 129 P3 5 11 99 65 TWD F07 +1.14 0.05 143 P3 4 Page 25

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report APPENDIX B: SG12 FBW INDICATIONS SG ROW CO IND LOCATION VOLTS DEG CHNl 2012%TW 12 53 105 TWD F07 -0.94 0.92 106 P3 33 12 111 89 TWD F07 +1.39 0.52 132 P3 25 12 105 89 TWD F07 +1.30 0.48 125 P3 24 12 110 86 TWD F06 -1.11 0.4 136 P3 21 12 103 81 TWD F07 +1.79 0.31 113 P3 18 12 107 83 TWD F06 +0.48 0.31 121 P3 18 12 107 85 TWD F07 -1.11 0.26 141 P3 16 12 41 45 TWD F07 -1.17 0.24 111 P3 15 12 85 59 TWD F07 +1.29 0.24 113 P3 15 12 92 78 TWD F07 -1.83 0.25 114 P3 15 12 102 82 TWD F06 -1.89 0.24 134 P3 15 12 102 88 TWD F06 +1.31 0.25 135 P3 15 12 105 83 TWD F06 -0.61 0.25 121 P3 15 12 121 85 TWD F06 -1.42 0.24 91 P3 15 12 93 71 TWD F07 -1.86 0.23 122 P3 14 12 103 79 TWD F06 -0.81 0.21 118 P3 14 12 103 83 TWD F06 +0.48 0.21 133 P3 14 12 104 84 TWD F06 +1.22 0.21 123 P3 14 12 104 90 TWD F07 -1.83 0.23 107 P3 14 12 107 77 TWD F06 -0.75 0.21 120 P3 14 12 108 82 TWD F06 -1.86 0.22 121 P3 14 12 79 49 TWD F06 +1.18 0.2 113 P3 13 12 103 79 TWD F07 +1.71 0.2 117 P3 13 12 104 78 TWD F07 +0.87 0.2 128 P3 13 12 105 83 TWD F07 -0.52 0.19 127 P3 13 12 105 85 TWD F07 +1.25 0.2 117 P3 13 12 106 82 TWD F07 +0.74 0.2 112 P3 13 12 108 82 TWD F07 +0.66 0.2 128 P3 13 12 108 84 TWD F07 +1.80 0.2 123 P3 13 12 108 88 TWD F06 -0.69 0.2 118 P3 13 12 109 89 TWD F07 +0.76 0.2 115 P3 13 12 110 92 TWD F06 -0.74 0.2 118 P3 13 12 111 85 TWD F07 +0.87 0.2 125 P3 13 12 111 87 TWD F07 +0.83 0.2 119 P3 13 12 115 87 TWD F07 +1.30 0.21 133 P3 13 12 120 80 TWD F07 -1.80 0.2 129 P3 13 12 93 83 TWD F06 +0.42 0.19 125 P3 12 12 95 83 TWD F06 +0.46 0.19 118 P3 12 12 101 83 TWD F06 +0.53 0.18 130 P3 12 12 103 85 TWD F07 -1.04 0.18 142 P3 12 12 103 91 TWD F06 -1.76 0.18 105 P3 12 Page 26

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report 12 107 83 TWD F07 -0.68 0.19 132 P3 12 12 108 88 TWD F07 -1.79 0.17 102 P3 12 12 109 79 TWD F06 -0.83 0.19 106 P3 12 12 115 85 TWD F07 +0.80 0.18 86 P3 12 12 116 86 TWD F06 -0.60 0.19 108 P3 12 12 116 86 TWD F07 +1.75 0.19 110 P3 12 12 128 80 TWD F06 -1.40 0.39 131 P5 12 12 132 88 TWD F06 +1.40 0.39 131 P3 12 12 40 16 TWD F06 +0.65 0.16 106 P3 11 12 66 52 TWD F08 -0.95 0.17 123 P3 11 12 82 90 TWD F07 +1.39 0.17 121 P3 11 12 83 87 TWD F08 +1.91 0.17 146 P3 11 12 88 92 TWD F08 +0.89 0.16 109 P3 11 12 89 91 TWD F06 -1.76 0.17 138 P3 11 12 91 75 TWD F07 +1.75 0.16 108 P3 11 12 94 76 TWD F07 +0.70 0.16 128 P3 11 12 94 92 TWD F07 +1.94 0.17 120 P3 11 12 95 79 TWD F07 +1.75 0.16 98 P3 11 12 98 90 TWD F07 -0.96 0.16 97 P3 11 12 99 89 TWD F07 -0.81 0.17 114 P3 11 12 100 90 TWD F07 -1.90 0.16 90 P3 11 12 101 93 TWD F07 +0.91 0.16 86 P3 11 12 103 75 TWD F07 +1.71 0.16 112 P3 11 12 104 94 TWD F07 +1.99 0.16 131 P3 11 12 105 87 TWD F07 +0.74 0.17 114 P3 11 12 110 86 TWD F07 +1.80 0.17 129 P3 11 12 110 88 TWD F07 +1.70 0.17 135 P3 11 12 128 80 TWD F07 -1.27 0.35 136 P5 11 12 41 57 TWD F07 -0.95 0.15 121 P3 10 12 49 65 TWD F07 -1.62 0.14 116 P3 10 12 66 20 TWD F06 -1.10 0.14 124 P3 10 12 67 89 TWD F07 +1.24 0.14 103 P3 10 12 83 91 TWD F07 -0.80 0.15 106 P3 10 12 84 92 TWD F08 +0.80 0.15 128 P3 10 12 86 90 TWD F07 -1.06 0.15 117 P3 10 12 87 75 TWD F07 +1.75 0.15 121 P3 10 12 88 92 TWD F07 +1.98 0.15 79 P3 10 12 89 79 TWD F08 +0.76 0.14 120 P3 10 12 89 83 TWD F06 +0.41 0.15 122 P3 10 12 89 91 TWD F07 +0.91 0.15 119 P3 10 12 92 90 TWD F07 +1.34 0.29 118 P5 10 12 95 81 TWD F07 +1.77 0.15 81 P3 10 12 97 81 TWD F07 +1.68 0.14 135 P3 10 Page 27

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit I - U1R21 180-Day Report 12 97 83 TWD F07 +0.48 0.15 137 P3 10 12 98 72 TWD F06 -1.84 0.14 122 P3 10 12 98 82 TWD F07 +0.67 0.15 81 P3 10 12 99 83 TWD F06 -0.61 0.14 147 P3 10 12 99 95 TWD F06 -1.86 0.15 62 P3 10 12 100 78 TWD F06 -1.72 0.15 107 P3 10 12 101 75 TWD F07 +1.57 0.15 106 P3 10 12 102 76 TWD F06 -1.87 0.15 83 P3 10 12 103 89 TWD F07 +0.83 0.14 111 P3 10 12 104 80 TWD F06 -1.79 0.15 134 P3 10 12 104 82 TWD F06 -1.88 0.15 123 P3 10 12 104 88 TWD F07 -1.82 0.14 125 P3 10 12 105 91 TWD F06 -1.76 0.15 97 P3 10 12 106 76 TWD F07 +0.90 0.15 141 P3 10 12 106 82 TWD F06 -1.95 0.15 116 P3 10 12 108 84 TWD F06 +1.21 0.15 148 P3 10 12 109 83 TWD F06 +0.42 0.15 110 P3 10 12 111 79 TWD F06 -0.79 0.14 137 P3 10 12 115 65 TWD F06 +0.61 0.14 157 P3 10 12 116 84 TWD F07 +1.89 0.14 128 P3 10 12 120 84 TWD F06 -0.79 0.14 107 P3 10 12 20 144 TWD F12 +1.86 0.13 132 P3 9 12 38 22 TWD F07 -0.86 0.13 78 P3 9 12 54 50 TWD F06 -1.01 0.12 65 P3 9 12 61 85 TWD F09 -0.94 0.12 131 P3 9 12 66 94 TWD F07 +0.94 0.13 90 P3 9 12 76 92 TWD F08 +0.72 0.12 111 P3 9 12 82 86 TWD F07 +1.89 0.12 99 P3 9 12 82 94 TWD F07 +2.04 0.12 109 P3 9 12 85 81 TWD F03 -1.11 0.12 33 P3 9 12 85 89 TWD F11 +2.41 0.12 93 P3 9 12 85 91 TWD F05 -0.85 0.13 117 P3 9 12 87 91 TWD F05 -0.75 0.13 135 P3 9 12 89 91 TWD F08 +1.93 0.13 127 P3 9 12 91 91 TWD F07 +0.78 0.12 93 P3 9 12 92 92 TWD F08 +0.83 0.12 81 P3 9 12 94 90 TWD F07 -1.08 0.13 100 P3 9 12 96 78 TWD F06 -1.79 0.12 108 P3 9 12 96 82 TWD F06 -1.84 0.13 80 P3 9 12 97 91 TWD F07 +0.87 0.13 118 P3 9 12 97 93 TWD F07 -0.89 0.12 109 P3 9 12 98 76 TWD F06 -1.80 0.13 98 P3 9 12 99 75 TWD F07 +1.75 0.13 1119 1P3 9 Page 28

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report 12 99 79 TWD F07 +1.54 0.13 126 P3 9 12 99 79 TWD F06 -0.72 0.13 87 P3 9 12 99 81 TWD F07 +1.75 0.13 103 P3 9 12 99 89 TWD F07 +0.91 0.13 115 P3 9 12 100 88 TWD F07 +1.95 0.13 74 P3 9 12 101 63 TWD F06 +0.65 0.14 41 P3 9 12 101 91 TWD F06 -1.67 0.13 98 P3 9 12 101 91 TWD F07 +0.76 0.13 103 P3 9 12 102 78 TWD F07 +0.74 0.13 122 P3 9 12 103 91 TWD F07 +0.87 0.12 125 P3 9 12 104 72 TWD F06 -1.61 0.14 105 P3 9 12 104 86 TWD F06 -0.74 0.12 53 P3 9 12 105 85 TWD F06 -1.75 0.13 82 P3 9 12 105 91 TWD F07 +0.85 0.12 140 P3 9 12 106 78 TWD F07 +0.77 0.13 134 P3 9 12 106 88 TWD F07 -1.07 0.13 122 P3 9 12 106 90 TWD F07 -1.80 0.12 107 P3 9 12 107 89 TWD F07 +0.87 0.13 98 P3 9 12 108 90 TWD F08 +0.86 0.12 87 P3 9 12 110 88 TWD F06 -0.48 0.13 128 P3 9 12 110 90 TWD F07 -1.76 0.13 128 P3 9 12 111 79 TWD F07 +1.86 0.13 114 P3 9 12 112 90 TWD F05 +1.88 0.13 118 P3 9 12 113 83 TWD F06 +0.44 0.13 137 P3 9 12 114 80 TWD F06 -1.84 0.13 100 P3 9 12 114 90 TWD F09 +1.96 0.13 72 P3 9 12 116 88 TWD F06 -0.60 0.12 129 P3 9 12 116 92 TWD F06 +1.79 0.13 136 P3 9 12 117 79 TWD F07 +1.75 0.14 130 P3 9 12 117 89 TWD F07 +0.80 0.13 106 P3 9 12 122 88 TWD F07 +1.94 0.13 115 P3 9 12 80 124 TWD F07 +1.63 0.11 135 P3 8 12 82 92 TWD F08 +0.93 0.12 84 P3 8 12 84 88 TWD F07 -1.84 0.11 80 P3 8 12 84 88 TWD F08 +0.87 0.11 69 P3 8 12 85 91 TWD F06 +1.47 0.12 115 P3 8 12 87 83 TWD F06 +0.46 0.12 93 P3 8 12 89 75 TWD F07 -1.91 0.11 110 P3 8 12 90 92 TWD F08 -0.93 0.11 90 P3 8 12 93 91 TWD F08 +1.93 0.12 128 P3 8 12 94 76 TWD F06 -1.84 0.11 132 P3 8 12 95 91 TWD F08 +1.93 0.12 110 P3 8 12 96 78 TWD F07 +0.76 0.11 77 P3 8 Page 29

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - UIR21 180-Day Report 12 96 88 TWD F07 +1.99 0.12 115 P3 8 12 97 83 TWD F06 +0.44 0.12 144 P3 8 12 98 72 TWD F07 +0.68 0.11 128 P3 8 12 98 82 TWD F06 -1.89 0.11 77 P3 8 12 99 83 TWD F07 -0.57 0.11 126 P3 8 12 99 87 TWD F07 +0.83 0.12 128 P3 8 12 99 89 TWD F08 -0.78 0.11 103 P3 8 12 99 93 TWD F07 +0.94 0.11 84 P3 8 12 103 81 TWD F06 -0.68 0.11 119 P3 8 12 104 76 TWD F06 -1.86 0.11 132 P3 8 12 105 93 TWD F07 +1.07 0.11 119 P3 8 12 106 84 TWD F06 -0.83 0.11 149 P3 8 12 106 94 TWD F07 +1.98 0.12 118 P3 8 12 107 93 TWD F07 -0.85 0.11 124 P3 8 12 108 86 TWD F05 -1.21 0.24 143 P5 8 12 110 78 TWD F07 +0.79 0.11 75 P3 8 12 112 74 TWD F04 +1.09 0.12 53 P3 8 12 112 78 TWD F07 +0.68 0.11 132 P3 8 12 112 88 TWD F07 -1.84 0.11 131 P3 8 12 114 92 TWD F06 +1.96 0.12 93 P3 8 12 115 83 TWD F06 +0.46 0.11 122 P3 8 12 116 84 TWD F06 -0.81 0.12 74 P3 8 12 121 87 TWD F07 +0.80 0.11 87 P3 8 12 123 87 TWD F07 +0.83 0.11 77 P3 8 12 124 74 TWD F04 -1.42 0.11 48 P3 8 12 132 88 TWD F05 +1.51 0.23 128 P5 8 12 63 59 TWD F10 +2.67 0.1 119 P3 7 12 66 94 TWD F07 +1.82 0.1 135 P3 7 12 68 92 TWD F08 +0.76 0.09 122 P3 7 12 76 90 TWD F07 -1.86 0.09 133 P3 7 12 79 75 TWD F07 +1.71 0.1 118 P3 7 12 81 75 TWD F08 +0.74 0.1 120 P3 7 12 82 92 TWD F07 +1.96 0.1 144 P3 7 12 85 75 TWD F08 +0.81 0.1 68 P3 7 12 87 77 TWD F07 +1.86 0.1 125 P3 7 12 87 81 TWD F07 +1.57 0.1 93 P3 7 12 89 93 TWD F08 -0.76 0.09 68 P3 7 12 93 91 TWD F07 +0.85 0.09 90 P3 7 12 93 95 TWD F07 +0.98 0.1 107 P3 7 12 94 88 TWD F07 +2.00 0.1 144 P3 7 12 94 92 TWD F08 +0.91 0.1 117 P3 7 12 96 88 TWD F06 -0.67 0.09 56 P3 7 12 96 90 TWD F07 -1.92 0.1 49 P3 7 Page 30

A AR EVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - Ul R21 180-Day Report 12 98 84 TWD F08 -1.95 0.09 97 P3 7 12 98 92 TWD F07 -0.35 0.1 93 P3 7 12 99 83 TWD F08 +0.63 0.1 54 P3 7 12 100 86 TWD F06 +0.76 0.09 101 P3 7 12 101 87 TWD F07 -0.74 0.09 54 P3 7 12 101 87 TWD F07 +0.82 0.09 86 P3 7 12 102 78 TWD F06 -1.86 0.1 122 P3 7 12 102 86 TWD F06 -0.70 0.09 112 P3 7 12 103 73 TWD F07 +1.75 0.09 112 P3 7 12 104 92 TWD F07 +1.85 0.09 121 P3 7 12 106 96 TWD F08 -0.74 0.1 111 P3 7 12 107 75 TWD F07 +1.88 0.09 90 P3 7 12 107 87 TWD F07 +0.78 0.09 124 P3 7 12 108 72 TWD F07 +0.61 0.09 122 P3 7 12 108 84 TWD F06 -0.79 0.09 93 P3 7 12 112 86 TWD F06 +0.80 0.09 124 P3 7 12 112 92 TWD F06 +1.87 0.1 74 P3 7 12 115 77 TWD F06 -0.75 0.09 129 P3 7 12 118 76 TWD F06 -1.82 0.1 125 P3 7 12 118 82 TWD F06 -1.80 0.09 97 P3 7 12 118 92 TWD F06 +1.76 0.1 111 P3 7 12 136 92 TWD F08 -0.67 0.1 107 P3 7 12 79 91 TWD F07 +0.72 0.08 153 P3 6 12 85 91 TWD F07 -0.76 0.08 62 P3 6 12 85 95 TWD F07 -0.96 0.09 137 P3 6 12 89 87 TWD F08 +1.91 0.09 82 P3 6 12 90 72 TWD F06 -1.89 0.08 86 P3 6 12 92 90 TWD F07 -1.94 0.07 60 P3 6 12 92 92 TWD F07 +1.89 0.08 128 P3 6 12 94 82 TWD F06 -1.77 0.09 140 P3 6 12 96 88 TWD F08 +0.89 0.09 113 P3 6 12 100 90 TWD F08 -1.83 0.09 94 P3 6 12 100 90 TWD F05 +1.90 0.09 74 P3 6 12 106 86 TWD F07 +1.89 0.08 128 P3 6 12 109 93 TWD F05 -0.70 0.09 90 P3 6 12 113 87 TWD F07 +0.78 0.09 86 P3 6 12 114 76 TWD F06 -1.80 0.08 103 P3 6 12 114 88 TWD F09 -0.76 0.08 115 P3 6 12 120 86 TWD F08 +0.84 0.08 45 P3 6 12 121 81 TWD F07 +1.72 0.08 133 P3 6 12 123 79 TWD F07 +1.71 0.08 57 P3 6 12 126 86 TWD F07 +1.89 0.08 118 P3 6 12 132 88 TWD F08 -1.14 0.17 136 P5 6 Page 31

A AREVA Document No.: 51-9178625-000 Calvert Cliffs Unit 1 - U1R21 180-Day Report 12 84 82 TWD F05 -0.78 0.07 117 P3 5 12 87 75 TWD F09 -0.81 0.07 99 P3 5 12 92 94 TWD F07 +2.10 0.06 122 P3 5 12 106 86 TWD F06 -0.72 0.07 139 P3 5 12 128 80 TWD F06 +1.20 0.13 130 P5 5 12 5 5 TWD F12 -4.27 0.06 61 P3 4 Page 32

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