ML19331C566

Part 21 Rept Re Out of Spec Bolt Torque Values on High Pressure Core Spray Pump.Unit 1 Pumps Have Been Retorqued to Values Specified.Unit 2 Pumps Will Be Retorqued

ML19331C566
Person / Time
Site:	Grand Gulf
Issue date:	08/04/1980
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:
References
REF-PT21-80-268-000 AECM-80-182, NUDOCS 8008190050
Download: ML19331C566 (5)

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PART (1 TDBUIFICATION NO. C&PANY IWFJ hLf DATE OF ETER. h/fo DOCKET NO. mo DAE DISTRIBUTED F////Fd ORIGIIMLREPORT g SU??lB M ARY DISTRIBUTION:

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EACTOR (R) FUEL CYCE & SAFEGUAR3S(S)

IE FIES bEI IE FIES AD/ROI(2) IE FIES AD/SG AD/RCI v -

AD/FFFBI AD/ROI EGIONS 1,II,III,lV,V EGIONS 1,II,III,IV,V EGIONS I,II,Ill,IV,V VB00R BR. R-IV VEIGOR BR R-IV VSOOR BR. R-IV L0EB / PPA M G 5715 ftBS / FCES SS-395 NRR/ DOL AE03 MB 76E lEB / FPA M G 5715 ftBS / SG SS-881 .

NRR/ DOE AEOD MB 7602 lEB / I'PA MG 5715 NRR/DSI ASBP FM 4E0 AEOD M B 7602 tR E T  ? SAP /SP MS-7210A ASBP FAI 450 NRR/ DOL -

CEhTPAL FIES 016 CENTRAL FIES 016 ASBP FM 450 CBURAL FIES ( CHRON) CENTRAL FIES (CHR000 CBERAL FIES 016 PDR CENTRAL FIES SS-395 CBdRAL FIES (DiRON) LPDR PDR T IPDR PDR TERA

[PDR TERA TEPA THIS DOCUMENT CONTAINS ACTION: POOR QUALITY PAGES PRELIMItMRY EVALUATION OF THE' ATTACHED REPORT ItOICATES LEAD RESPONSIBILITY FOR FOLLOh'JP AS SFOhN BELOW:

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g Helping Build f.fississippi S" P. O. B O X 164 0. J AC K S ON. MIS SIS S!P PI 3 9 2 0 5 tmeAn en cu: Tion espanintwT August 4, 1980 4

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i Office of Inspection & Enforce =ent bg U. S. Nuclear Regulatory Co=nission d' d Region Il 101 Marietta Street, N.W.

Suite 3100 Atlanta, Georgia 30303 1.

i Attention: Mr. J. P. O'Reilly, Director l

Dear Mr. O'Reilly:

SU3 JECT: Grand Gulf Nuclear Station j- Units 1 and 2 t Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/17, Final Report, Incorrect Bolt Torquing on High Pressure I Corc Spray Pu=p AECM-80/182

Reference:

AECM-80/99, 5/9/80 On April 10, 1980, Mississippi Power & Light Companj notified Mr. F. Cantrell of ycur office of a Potentially Reportable Defi-ciency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns out of specification bolt torque values noted on the High Pressure Core Spray (HPCS) pu p. The purp was manufactured by the Byrcn Jackson Pu p Division of Borg Warner

Corporatica and was procured by General Electric for use at GGNS.

We have deternined this deficiency to be reportable within the ceaning of both 10CFR50.55(e) and 10CFR21. Our final reports are i attached.

4 Yours truly,

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! y J. P. McGaughy, Jr.

I Assistant Vice President, Nuclear Production

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i Member Middle South Utilities System

MISSISSIPPI POWER & LIGHT COMPANY s

Mr. J. P. O'Reilly AECM-80/182 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. "cGehee Mr. T. B nner Mr. Victor Stello, Director , w/3 Division of Inspection & Enforcement U. S. Nuclear Regulatory Co= mission Washington, D.C. 20555 bec: Dr. D. C. Gibbs Mr. N. L. Stampley Mr. J. P. McGaughy Mr. J. N. Ward Mr. J. W. Yelverton Mr. A. Zaccaria Mr. L. F. Dale Mr. C. K. McCoy Mr. T. H. Cloninger Mr. R. A. Ambrosino Mr. C. L. Tyrone Mr. M. Hunt Mr. A. G. Wagner PRD File File I

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Attachment to AECM-80/182 Page 1 of 1 FINAL REPORT FOR PRD-80/17 I. Description of Deficiency The NSSS Supplier issued a Field Disposition Instruction (FDI

1. 32-42382) on August 7, 1978. The purpuse of the FDI was to update the ECCS Pump Technical Manuals pending their revision. Speci-fically, the FDI updated the bolt torquing procedure to vendor preferred values. The pumps in question were those provided for the Residual Heat Removal (RER), Low Pressure Core Spray (LPCS) and High Pressure Core Spray (HPCS) Systems. Based on the FDI, the tenth (10th) stage of the HPCS pump was disassembled and the thrust collar bolts ( " dia. x 13 UNC) were checked for actual torque values. This check revealed that the actual torque values varied from 25-45 ft. lbs. These values were contrary to the vendor specified original torquing requirement of 15 ft.

lbs. as well as the updated torquing values of 40-55 f t. lbs.

specified by the FDI. Based on this preliminary check, the sa=ple size was increased to check the actual torque values for the case bolts and thrust collar cap screws of the sixth (6th), seventh (7th),

eighth (8th), and ninth (9th) stage of the HPCS pump. This check revealed additional incensistencies in torquing values; for ex-ample, a number of 1 3/E" dia. casing studs weta found 225 ft.

lbs. lover than the minimum NSSS Supplier values.

II. Safety Implications Had this condition remained uncorrected, the inconsistency in the "as assembled" torque values found within a stage of the pump could lead to unbalanced load distribution causing nndue wear and vibration. This could result in pump degradation and a sub-sequent f ailure of the pump to perform its intended saf ety function.

III. Corrective Action The ECCS Pumps for Unit I have been disassembled and retorqued to the values specified by the FDI. The Unit II ECCS pumps will be disassccbled and retorqued to the appropriate values during system inspection and checkout. Details of this condition are available at the plant site in Bechtel MCAR GGSS 71 and MPSL PRD-80/17.

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e 10 CFR F/RT 21 RFFORT o

1. Idantificatien of individunite) informing the NP.Ct Name(s): W. " 'MyS A. . rtacey Telephone call to M. Hunt, NRC, Region II, 8/5/80.

Addresa: Mississippi Fever & Light Company. P. O. Box 1640 Jackson. MS 39205

2. Identification of entity f ailing to comply or containing a defect (check appreptf ate blocks):

CRAND CULF NUCLTAR STATION Unit 1 Unit 2 A Other ___

(Specify)

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3. Supplier Nuclear Engineering Division San Jose, CA

4. Nature of the defect or f ailure to comply and the safety hazard which is created or could be created by such Jefcet er failure to ccmply:

See paragraphs I & II to Attachment A to AECM-80/182.

5. Date inforsation ebtair.ed fer this report:

6. Additional inferration for defective compenents incorperated in ether facilities, as applicable Number in uso, supplied fer.

Facility /1ocation or beine Supplied (This information is not available to MP&L)

7. Corrective Action: See paragraph III to Attachment A to AECM-80/182.

Responsibility: Misy_issirri ?ner 61.1-5t Quality Assurance Section (Name pf individual or organization)

Time Required To Complete Actien: 3egan: 4/14/80, Complete for Unit 1: Unit 2 corrective action complete by Unit 2 Fuel load, close of MCAR-71.

8. Advice related to the defect or failure to eceply about the facility, activity, or basic cerroner.t that his been, is being, or vill be given to purchasers er licensees:

None given at this time (NOTE: General Electric Comocnv stated that thev do not agree that this conditica should be reported under either 10CFR30.55(e) er 10CFR21.)

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