ML20134K002

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Fuel Assembly Insp Program
ML20134K002
Person / Time
Site: Millstone Dominion icon.png
Issue date: 10/10/1996
From: Colburn D, Desiree Davis, Halligan J
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML17062B149 List:
References
PPE-96-244, NUDOCS 9611180183
Download: ML20134K002 (26)
v • d • e


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l Millstone 3 Fuel Assembly Inspection Program i Contributors:

I D. J. Colburn D. D. Davis J. R. Halligan T. R. Freeman H. Kunishi October 10,1996 Inspection work was conducted at Millstone Unit 3 by an NSD crew under the direction of PPE contract engineer Jim Kisak. Responsibility for the reduction and verification of individual portions of the inspection program was assigned to various PPE engineers. Their signatures on this i

document attest that (1) they have independently verified the sections assigned to them; and (2) they concur with the results documented herein. A listing of the individual data reduction and verification assignments is given below:

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insnection Program Section Originating Engineer Verifvina Enaineer 1.0 Background & Objectives D. Colburn J. Halligan 2.0 Full Length RCCA Drag Tests D. Davis D. Colburn I 3.0 Guide Thimble Plug Gage Exams J. Halligan D. Colburn 4.0 F/A Length Measurements H. Kunishi T. Freeman 5.0 Fuel Rod Growth Data H. Kunishi T. Freeman 6.0 Overall Summary D. Colburn D. Davis  !

4 Signatures On File i

D. J. Colburn D. D. Davis Product Performance Engineering Product Performance Engineering d

H. Kunishi T. Freeman Product Performance Engineering Product Performance Engineering 9611100183 961016 PDR TOPRP ENVWEST B PDR -

J. R. Halligan Product Performance Engineering ppe-96-249.c10

, PPe*96-244

w:acingssu2e vr:priaesty cassa a 1.0 Background and Objectives i

An RCCA insertion anomaly was experienced at Wolf Creek and South Texas Unit 1.

During SCRAMS, several RCCAs did not fully insert. Wolf Creek conducted cold drop tests i

! after the event and additional RCCAs did.not.fullv. insert. A subseauent.insoection orocrarr.**bac 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 needed to determine if the growth of the fuel assemblies and fuel rods is within the predicted range.

2.0 Full Length RCCA Drag Tests (Spent Fuel Pool)

Fuel assemblies fabricated for two different contracts were drag tested in the spent fuel pool. The specific fuel features for each contract are shown below. Nine of the ten fuel assemblies that were tested were fabricated with Vantage SH fuel features.

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T'he drag testTes~ uits are tabulatedWTable 2.I.' The Ulillstone Unit 3 dashpot and upper l

guide thimble data is shown in Figure 2.1 along with data from other plants. As shown in **b

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WBSCin*)1ous = Proprietary Cicas'3 Figure 2.1: Dashpot and Upper Guide Thimble Drag Data <

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in Figures A.1 and A.2, the dashpot and guide thimble drag data are graphed versus their b'* l corresponding F/A fast fluence. At Wolf Creek, incomplete RCCA insertions occurred in ~

2 j fuel with FIA fluences greater than 9 x 10 : nyt, when the dashpot and guide thimble drag i F.5.1 criteria were exceeded. In contrast to the Wolf Creek fuel, none of the Millstone Unit 3 fuel assemblies exceeded the F-5.1 upper guide thimble drag criteria of 40 lbs. nor the dashpot drag criteria of 100 It. ).

b i Table 2.1: Millstone Unit 3 Drag Test Data

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, Figure 3.1: Dashpot "G0/NO G0" Probes 17x17 Fuel Assemblies

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Figure 3.3
Millstone 3 Fuel Assembly F02 4 Dashpot Probes 1

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Westinghouss Proprietary Class 3 c,b,c 4.0 Fuel Assembly Growth Data Fuel assembly length measurements were performed on 10 assemblies (1 assembly from ,,,

Beaion E and 9 assembliesitantReaion_EL The_maasurements_waraanade_usion a .

5.0 Fuel Rod Growth Data The axial gaps between the peripheral rods and the assembly nozzles were measured from the low magnification TV tapes of 10 Millstone Unit 3 assemblies to determine fuel rod growth. The assemblies were E40, F85, F18, F02, F87, F86, F01, F11, F81 and F25.

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in Appendix C, the calculated rod growth data is summarized. The maximum, average, and minimum rod growth values for each assembly are listed in the table below. The data *

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wxtinghouss hepriotsiy cess 3 Appendix A Millstone 3 Fuel Assembly Drag Data l

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t WesehphmoJ Prcydetwy Cteso 3 Figure A.1: Dashpot Drag and Fast Fluence Data

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