ML070370587

E-MAIL: (PD) Fwd: Entergy Info on Drywell Liner UT Measurements

ML070370587
Person / Time
Site:	Pilgrim
Issue date:	01/17/2007
From:	Perry Buckberg NRC/NRR/ADRO/DLR
To:	Jennifer Davis, Dan Hoang NRC/NMSS/DHLWRS/TRD, NRC/NRR/ADRO/DLR
References
TAC 3698
Download: ML070370587 (17)

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Page 1 of I Perry Buckberg - Fwd: Entergy Info on Drywell Liner UT Measurements From:

To:

Date:

Subject:

CC:

Perry Buckberg Dan Hoang; James Davis 1/17/2007 8:01:07 AM Fwd: Entergy Info on Drywell Liner UT Measurements Kenneth Chang Jim/Dan, Attached is UT data from 1999 and 2001 that was not forwarded with the 1987 UT data last week.

Perry

>>> Glenn Meyer 1/17/2007 7:55 AM >>>

Drywell UT information from Entergy

>>> "Mogolesko, Fred" <_fmogolebentergy.corm > 01/16/2007 12:11 PM >>>

Attached please find the following:

1. Data Sheet No. 99-U-267: Drywell Liner UT Measurements--5/13/99[1 page]

2. Data Sheet No. 99-U-537: Drywell Liner UT Measurements--5/25/99[2 pages]

3. UT Measurements for IWE Program--4/29/01[4 pages]

4. Memo: UT Measurements of Drywell Liner Plate:

NDE-87-20/QAD-87-129--1/27/87[8 pages].

Fred Original Message----'--

From: PNP1.18,DoNotRepy_@Entergy.com

[rmailto:PNP118 DoNotReply@Erntergy.com]

Sent: Tuesday, January 16, 2007 6:29 AM To: Mogolesko, Fred

Subject:

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Fwd: Entergy Info on Drywell Liner UT Measurements 1/17/2007 8:01:07 AM Perry Buckberg PHBI@nrc.gov Recipients nrc.gov OWGWPO03.HQGWDO01 AM JAD (James Davis)

KXC2 CC (Kenneth Chang) nrc.gov OWGWPO04.HQGWDO01 AM DVH (Dan Hoang)

Action Delivered Date & Time 1/17/2007 8:01:14 Delivered 1/17/2007 8:01:14 Post Office OWGWPO03.HQGWDO01 OWGWPO04.HQGWDO01 Files.

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I DATA SHEET NO. ? ?- 0-;- ? 4 7 Component or System I Procedure 0 c 1c -5. 14 I MR Number Date 14I q 0 I

1/3/99 ln.qfrUment M&TE No. Ope A* P M

ion Mechanical Gauge M&TE No. CLP-06?

Precision

/.

Preference Samples - Mechanical Measurements: 1.

0

.2.

570 0

33. Jc" Ultrasonic Measurements:

Time Initial: A

1.. q0 2..OO"

3. b,.-5" 3i o0 30,.3 A Maxdmum

.1%lifie

,V3/l.

3. /A,5"03" j6:35A Difference Verification:- 1. 22911 2.

.5000 3.

A. S;'f f/

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2.

3. _

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1.

2.

3.

Drift Verification:

1.

2.

3. L_______

Vedfication:

1.

2.

3.

Veriflcation:

1

2.

3..

V/erific tion-:

1.-........

-2.

___3._

Maximum Probable Error Sum of Instrument and mechanical precisions, max. difference and drift = +

. CO t/

Examination Data, Sketch or Description of Measured Locations 0

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e.o /

Preference Samples - Mechanical Measurements: 1. e,3ea 2. L,.,.... 3. L..--,:;w Ultrasonic Measurements:

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1.-3o 2'..&.2 3.!

0 27."30 Max Verification:

M. 3o/

2. "/.0'3 37/.

12Y. 30 Diffe Verification:

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Maximum Probable rror Sum of Instrument and mechanical precisions, max. difference and drift = +.

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Examination Data, Sketch or Description of Measured Locations 4, 64,/-,,t,o,,. i./oi 4*47 01.,

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3.

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• p3/) 5/b I Point # :

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I.

2. /'

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1.

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Examination Data, Sketch or Description of Measured Locations e7 9 6"-A-iuATn C0.r -

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Maximum Probable Error

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Examination Data, Sketch or Description of Measured Locations 0

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t lb MMMMWý Boston Edison Company To: R. K. Swanson.

Date: January 27.

1987 0OFFICL 00MAN"~

from: s. F. Brannan >'

98~7700 7c Record Typo A4,.W Dept. Doc. N DE87-2OiQA-87-129*on-S~afety Rtlett@4

Subject:

Ultrasonic Thickness Measurement of Drywell Liner Plate (NESR Number 86-03 and NP 817-50-1)

F. K. Famulari OC Clerk PNPS

8. Perkins J. Seery 0A File 1.6.1

Reference:

(a)

(b)

(c)

(d)

NESR 86-03 QCI 50.40.

NRC Information Notice 86-99 RICSIL No.09

!,r

Enclosure:

(A)

Ultrasonic Thickness Measurement Report Summary r% The Nuclear Engineering Department requested that specific areas of the primary containment drywell liner plate be measured for wall thickness.(NESR

-. ber 86-03).

The request cited the NRC Information Notice 86-99, and the General Electric Company RICSIL No.

09 as alerting utilities of possible corrosion of the drywell liner material.

The drywll liner plate was ultrasonically examined, with no degradatioh'ýby corrosion found.

t)

I Discussionr In response to reference (a) a plan was established to:

.* o Obtain the required measurements.

f C.

Provide additional scanning surface in the event further evaluation. was required.

o Optimize the examination technique for both wall thickness and pitting corrosion.

Twelve 6" by 6" areas were prepared for ultrasonic examination at elevation 91 - 2'.

This area was chosen to allow scanning for pitting :.

r--7 '.

other techniques such as angie ueam if further evaluation were required.

DOC selected the scope ultrasonic instrument, as opposed to a digit.'

instrument, to allow for more detail evaulation of the ultrasonic signal, such as lamination and pitting.

KRELEASED JAN309B7 0ORU" R' ROUfWtI CONTROL COPY

Dept. DOC.

Dae awr 1

97P-To:

Dt:Jnay2,16 t

Subject:

Ultrasonic Thickness Neasurmn t Of 9r-vWel tiner Platt (IKSI b 86-03 and MR 87-50-1)

All twelve areas were ultrasonically examined in accordance with referwen (b).

The plate thickness appears to be consistent (1.1 ltches) which compares with the design thickness of 1.0625 inches.

Three small reflectors vwre fo*W

'..a $-

at area 9 and 12 of attached report.

These reflectors werv evaluated as inclusions because they did not reduce the backface signal.

Conclusion The drywell line plate has not experienced general or localiz:J corruku.,.

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