ML20134J999

Fuel Assembly Insp Program

ML20134J999
Person / Time
Site:	Sequoyah
Issue date:	09/23/1996
From:	Colburn D, Desiree Davis, Halligan J WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML17062B149	List: ML20134J950 ML20134J960 ML20134J974 ML20134J978 ML20134J984 ML20134J986 ML20134J989 ML20134J995 ML20134J999 ML20134K002 ML20134K008 NSD-NRC-96-4846, Transmits Proprietary & non-proprietary Versions of Preliminary Rept, Incomplete Rcca Insertion. W Authorization ltr,AW-96-1021 & Affidavit Requesting Info Be Withheld from Public Disclosure Encl
References
PPE-96-226, NUDOCS 9611180180
Download: ML20134J999 (9)

Text

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Westinghouse 9%pdetary class 3 l

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' l Sequoyah Fuel Assembly inspection Program '

Contributors:

l~ D. J. Colburn D. D. Davis J. R. Halligan i

September 23,1996 i

l The inspection work was conducted at Sequoyah by an NSD crew. Jim Kisak, PPE contract engineer, supervised the crew. Various PPE engineers were responsible for the reduction and verification of individual portions of the inspection program. Their signatures on this document l ' attest that (1) they have independently verified the sections assigned to them; and (2) they concur with the results documented hereis.. A listing of the individual data reduction and verification assignments is given below:

Insoection Program Sectico Originating Engineer Verifying Engineer

1.0 Background & Objectives D. Colburn J. Halligan 2.0 Full Length RCCA Drag Tests D. Davis D. Colburn 3.0 Guide Thimble Ph!g Gage Exams J. Halligan D. Colburn 4.0 Summary D. Colburn D. Davis Signatures On File D. J. Colburn D. D. Davis Product Performance Engineering Product Performance Engineering J. R. Halligan l Product Performance Engineering l

l 9611100180 961016 PDR TOPRP E B -

ppe-96-249,c9 ppe-96-226

W:stinghoun Proprietary Clan 3 1.0 Background and Objectives A RCCA insertion anomaly was experienced at Wolf Creek and South Texas Unit 1. During SCRAMS, several RCCAs failed to fully insert. Both plants conducted drop tests after the

- .anomalv. and additional RCCAs did not.fullv insert. . A subsecuent insoection orocram

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l The following tests were conducted during the inspection program:

(1) RCCA Drag Tests; (2) Guide Thimble Plug Gage Exams (Single Tube Probe Tests);

(3) Fuel Assembly Length Measurements; and (4) Fuel Rod-to-Nozzle Gap Measurements.

Fuel assembly length measurements and fuel rod to-nozzle gap measurements were used to l

determine if the growth of the fuel assemblies and fuel rods was within the anticipated j range. Items 3 and 4 will be reported in a separate report when the on-site data is available. Re-measurement is necessary because the adjusted assembly growth values l

measured during the first campaign are abnormally low.  ;

2.0 Full Length RCCA Drag Tests Fuel assemblies fabricated for seven (7) different contracts were drag tested in the spent fuel pool. The specific fuel features for each contract are shown below. Fourteen of the twenty-one fuel assemblies that were tested were fabricated with Vantage 5H fuel features.

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ppe-96-249,c9 ppe-96-226

Westkughous2 Proprietary Class 3 1 l

The drag test results are tabulated in Table 2.1. The Sequoyah dashpot and guide thimble .,3,e

. data _ are shown in Figure 2.1 with data from other plants. The lines in the figure represent _

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Table 2.1: Sequoyah Drag Test Data a,b,e 1

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PPe-96-249,c9 ppe-96-226

We*' Proprietary Cnnes 3 ,

t Figure 2.1: Dashpot and Upper Guide Thimble Drag Data F". . . _ . _ _ . . _ . _ . . _ . _ _ . . _ - . _ _ _ . _ _ . . _ . _ . . _ . _ _ _ _ . . _ _ . . _ _ . _ _. . _ . . . _ . _ . _ _ _ _ _ . . _ . _ . . _ _ _ _. __ _

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, and Ppe-96-249,c9 Ppe-96-226

W:stinghous2 Proprietary Class 3 3.0 Single Tube Probe Single tube probing was conducted on three fuel assemblies at Sequoyah Unit 2. The assemblies were selected based on burnup and drag measurements, and are included in

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_the_ table balow._The.nbiectivamf_the_tastwas_toMatarmina_the_extantandjacationaf_.___

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Single Tube Probe Test Results a,b,c J -

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wastinghous, proprietary class 3 i l

l 4.0 Summary a,b,e l

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ppe-96-249,c9 ppe-06-226

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e. Westkohouss Proprietary Class 3 i

4 Appendix A l

1 Sequoyah Fuel Assembly Drag Data 1

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Figure A.1: Dashpot Drag and Fast Fluence Data ,

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h. >ghouse Propnietary Cines 3 i 5

Figure A.2: Upper Guide Thimble Drag and Fast Fluence Data i i

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