ML12340A590

Official Exhibit - RIV000111-00-BD01 - Hopenfeld, Demonstration of Flawed Presentation of Checworks Data

ML12340A590
Person / Time
Site:	Indian Point
Issue date:	06/29/2012
From:	Hopenfeld J Riverkeeper
To:	Atomic Safety and Licensing Board Panel
SECY RAS
References
RAS 22866, 50-247-LR, 50-286-LR, ASLBP 07-858-03-LR-BD01
Download: ML12340A590 (3)

Text

United States Nuclear Regulatory Commission Official Hearing Exhibit Entergy Nuclear Operations, Inc.

In the Matter of:

(Indian Point Nuclear Generating Units 2 and 3)

ASLBP #: 07-858-03-LR-BD01 RIV000111 Docket #: 05000247 l 05000286 Submitted: June 29, 2012 Exhibit #: RIV000111-00-BD01 Identified: 10/15/2012 Admitted: 10/15/2012 Withdrawn:

Rejected: Stricken:

Other:

Dr. JORAM HOPENFELD Demonstration of Flawed Presentation of CHECWORKS Data Figure 1: A plot selected at random* from an Entergy CHECWORKS Report, showing how the data is presented by Entergy:

Excerpted from RIV00016A (CSI Technologies, Inc., Indian Point Unit 2 CHECWORKS FAC Model, Calculation No. 050714b-01, Revision 1, September 12, 2006, Batestamp IPEC00168480).

Figure 2a:

The non-conservative area of Figure 1 is re-plotted for comparison with Figure 3b below. Predicted wear on the y axis, measured wear on the X-axis. Top line is the LCF=1.060 line:

LCF Line

-50%

Predicted wear (mils 2lPage

Figure 2b Showing how many more non-conservative points are not bounded by the 50% when the measured data is plotted on the Y axis and the predicted data on the x axis:

Measured * ..,;

50%

/. "

wear (mils)

~

~ LCF Line

'" ,,/ ~

/" ~--

'00 y--

I ...... ~ y

.......-:::l~

o o"""" p ~;a.dwnr("!';ifl '"

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