ML20137W358

Forwards Info Re Calvert Cliffs U2R11,S/G Insp Project.Info Formed Basis for Conference Call W/Bg&E on 970409 to Discuss Results of SG Tube Insp

ML20137W358
Person / Time
Site:	Calvert Cliffs
Issue date:	04/16/1997
From:	Dromerick A NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
References
NUDOCS 9704180088
Download: ML20137W358 (18)

Text

.

April 16, 1997 ,

'M7 NOTE T0: File FROM: Alexander W. Dromerick

SUBJECT:

CALVERT CLIFFS U2R11, S/G INSPECTION NRC INFORMATION PROJECT The attached information "Calvert Cliffs U2R11, S/G Inspection Project" was delivered to me via Courier on April 8, 1997. This information formed the basis for our conference call with Baltimore Gas & Electric Company on April 9, 1997, to discuss the results of the steam generator tube inspection.

Attachment:

As stated

)ISTRIBUTION: 4

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Y Calvert Cliffs U2R11 S/G Inspection NRC Information Packet i

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4 l 1. Inspection Scope l 2. Inspection Results Colored Maps l

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3. Data Comparisons j 1995 Versas 1997 Voltages & Lengtlis Of Axial Cracks

! 4. In-Situ Pressure Testing

5. Inspection Completion Schedule

Development ofInspection Plan ECT Deposit ,

Zones i

ATHOS Unit 1 Deposit Findings Zones Define Sample 4

Plan

Scope of Exam for Unit 21997 RFO  :

The following examinations, as a minimum, shall be performed in the Spring,1997,  ;

Unit 2 Steam Generator Eddy Current Exam: ,

1. 100% Full Length Bobbin Exam

2. 100% Hot Leg, Top of Tubesheet +5/-1 inches: Plus Point Exam

3. 20% Sample of Tight Radius U-bend region (Rows 1 & 2): Plus Point Exam  ;

4. 20% Sample of Dents (greater than 5 volts): Plus Point Exam

5. 20% Sample of Steam Blanket Region U-bends (Rows 3-20): Plus Point Exam

6. 20% Cold Leg Top of Tubesheet +5/-1 inches: Plus Point Exam

7. 20% Sample of Upper Bundie Arc & Stay Dome Free Span Region: Plus Point Exam

8. 20% Rolled Mechanical Plugs: Plus Point Exam.  ;

9. 20% Hot Leg 9

• Tube Support Plate: Plus Point Exam i

I

03/97, CALVERT CLIFFS, UNIT 2 STEAM GENEAATOR: 21 DATE: 04/07/97 OUTAGE DATA SET CURRENT TIME: 17: 54: 49 Indication Location: 04H -2.00 to 06C -2.00 AND Percent: MAI,SAI,MSI TLL AND Area of Generator:

Include Expansion 1 . STAY DOME . EXPANSION 2 , EXPANSION #5BT AYS a

, EXPANSION #3 .

PLUGGED 427 x MAI O + SAI 11 + MSI C + TLL 454 e EVAL MULT SCOPE 1473 +

i 14c _. - -- ---,.-. - - - - - . _ . . - - - . - . . - , - . ...-.--_.- - - -_

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to ao so 40 so so 70 eo so too 120 sao 130 14o teo iso ROCKRIDGE TECHNOLOGIES

03/97, CALVERT CLIFFS, UNIT 2 .

STEAM GENERATOA: 22 DATE: 04/07/97  !

OUTAGE DATA SET . CUAAENT TIME: 16:23:.23 i Incication Location: 04H -2.00 to 06C -2.00 AND Percent: MAI.MSI.SAI.TLD AND Area of Generator:

Include MRPC ARC AOWS 60 - 120 .MRPC STAY COME .EXP #5 STEAM BLANKET , STAYS a i i l

PLUGGED 229

• MAI O + MSI O + SAI 3 + TLO 404

• l INLE VIEW EVAL MLLT SCOPE 2250 +

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10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 ROCKRIDGE TECHNOLOGIES

___..________________________-__________---____________-__________-____.]

t Comparison of CIRC Flaw Voltage j Last Outage vs This Outage CCNPP-2 1995 Results 60 , ,

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! Last Outage vs This Outage CCNPP-2 1995 Results  !

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Comparison of AXIAL Flaw Length Last Outage vs This Outage CCNPP-2 1995 Results 200 . .

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l Length (Inch) from + Point j l

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l In-situ Pressure Testing ,

- Latest EPRI guidance used for candidate selection and test methods .

- 3 candidates selected to date considering many factors such as length, voltage response, estimated depth, and regional locations Testing to 3e conducted locally or full tube depending on flaw location and geometry Leakage integrity evaluated at NODP,MSLB, and 3x NODP conditions 6

Calvert Cliffs U2R11

Steam Generator Primary Side Maintenance Estimated Completion Schedule Steam Generator 21 Hot Leg '

[

i l

l 4/7 4/8 4/8 4/9 4/10 4/11 4/12 4/13 4/17 4/1' 0800 1600 2200 2200 0400 1600 1600 2200 2200 1000 i i

i TTS Dent Plug Rem TTS and Stay Data In-Situ Plug i

Plugging / Bowl ND  !

MRPC MRPC MRPC SM-22 Dome Exp. Closecut Test VT Stabilization Closeout MW  !

32 6 24 6 36 24 12 6 l

96 24 12 i Hrs Hm Hm Hm Hm Hm Hm Hm Hm Hm Hm i.

i l

t i

4/7/97 1:42 PM compschd1 i

Calvert Cliffs U2R11  ;

Steam Generator Primary Side Maintenance ,

Estimated Completion Schedule Steam Generator 21 Cold Leg r

4/6 4/8 4/9 4/13 4/13 4/15 2200 1000 1000 1000 2200 1000 Steam Blanket Data Plugging / In-Situ Bowl ND Exp Closecut Stabilization Test Closeout MW 36 24 96 12 24 12 Hrs Hrs Hrs Hrs Hrs Hrs 4/7/97 1:46 PM compschd1

Calvert Cliffs U2R11 '

Steam Generator Primary Side Maintenance .

Estimated Completion Schedule Steam Generator 22 Hot Leg t

f l

4/7 4/8 4/8 4/9 4/9 4/10 4/14 4/16 0800 0200 1000 1000 1600 2200 2200 1000 j t

TTS Dent Plug 05H-06H Data Plug Plugging / Bowl ND j MRPC MRPC MRPC R1-3 Closeout VT Stabilization Closeout MW 18 8 24 6 24 6 96 24 12 Hrs Hrs Mrs Hrs Hrs Hrs Hrs Hrs Hrs 4/7/97 1:53 PM compschd1

i Calvert Cliffs U2R11 i Steam Generator Primary Side Maintenance Estimated Completion Schedule .

Steam Generator 22 Cold Leg i

4/8 4/9 4/9 4/10 4/11 4/15 4/17  ;

0800 0000 0600 1800 1800 1800 0600 i

TTS Dent Steam Blanket Data Plugging / Bowl ND MRPC MRPC Exp Closeout Stabilization Closecut MW 16 6 36 24 96 24 12 i Hrs l Hrs Hrs Hrs Hrs Hrs Hrs i

i 4/7/97 2:22 PM compschd1 .