View source for AECM-84-0213, Final Part 21 Rept for Unit 1 & Interim Rept for Unit 2 Re Potential Defect in Spare Piston Skirt Castings. Initially Reported on 840402.Caused by Improper Heat Treating During Mfg.Next Rept Expected by 841005

{{Adams
| number = ML20088A993
| issue date = 04/06/1984
| title = Final Part 21 Rept for Unit 1 & Interim Rept for Unit 2 Re Potential Defect in Spare Piston Skirt Castings. Initially Reported on 840402.Caused by Improper Heat Treating During Mfg.Next Rept Expected by 841005
| author name = Mcgaughy J
| author affiliation = MISSISSIPPI POWER &amp; LIGHT CO.
| addressee name = Oreilly J
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| docket = 05000416, 05000417
| license number = 
| contact person = 
| case reference number = REF-PT21-84-202-000
| document report number = AECM-84-0213, AECM-84-213, PT21-84-202, PT21-84-202-000, NUDOCS 8404160007
| document type = DEFICIENCY REPORTS (PER 10CFR50.55E &amp; PART 21), TEXT-SAFETY REPORT
| page count = 5
}}

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MISSISSIPPI POWER & LIGHT COMPANY
                               }                         Helping Build Mississippi M              P. O. B O X 164 0 J AC K S O N, MISSISSIPPI 39205
                                                  ;!   ND : 0 9 J AMES P. McGAUGHY. JR.
Pril 6, 1984 WiC8 PmESeptNT U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W.
Suite 2900 Atlanta, Georgia 30303 Attention:         Mr. J. P. O'Reilly, Regional Administrator

==Dear Mr. O'Reilly:==

==SUBJECT:==
Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/15525/15526/16694.4 PRD-84/06, Final Report for Unit 1, Interim Report for Unit 2, Potential Defect in Spare Piston Skirt Caetings AECM-84/0213 On April 2, 1984, Mississippi Power & Lignt Company notified Mr. R.
Carroll, of your of fice, of a Reportable Deficiency at the Grand Gulf Nuclear Station (GGNS). The deficiency concerns the improper heat treatment for certain spare Transamerica Delaval, Inc. (TDI) piston skirt castings.
:                       MP&L has evaluated this deficiency and has determined that it is l             reportable under the provisions of 10CFR21 for Unit 1.              Reportability for Unit l             2 is indeterminate at this time. Attached is the Unit 1 Final Report and Unit ~
2 Interim Report.          An update is expected for Unit 2 by October 5,1984.
Yours truly,
[ g J. P. McGaughy, Jr.
             #/KDS RDC/KDS:dr ATTACHMENT cc:       See page 2 8404160007 840416                                          OYMUIATWA'#[
g DR ADOCK 05000416 eDR yq
                                           - Member Middle South Utilities System          I l

Mr. J. P. O' Re illy                                AECM-84/0213
                             .' NRC                                                 Page 2 cc: .Mr. J. B. Richard Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Conunission
                                     -Washington, D.C. 20555                      .
Mr. G..B. Taylor South Miss. Electric. Power Association P. O. Box'1589 Hattiesburg,.MS 39401 i.
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Attachment to AECM-84/0213 Page 1 of 3 FINAL REPORT FOR UNIT 1 FOR PRD-84/06
.                                                                   INTERIM REPORT NO. 1 FOR UNIT 2 I
7 '
: 11. Name and address of the individual ... informing the commission:
,                                                   J. . P. McGaughy, Jr .
Vice-President, Nuclear P.O. Box 1640 Jackson, Mississippi 39205
: 2. Identification of the facility .. . which .. . contains a deficiency:
Grand Gulf Nuclear Station (GGNS) Unit 1
                                                 - Port Gibson, Ndssissippi 39150
                                                  -Determination of reportability for Unit 2 is continuing at this time.
                                  ~
1                                3.   -Identification of the fira . . . supplying the basic component which ...
l                                       contains a~ deficiency:
The. piston skirt' castings were manufactured by Transamerica Delaval,
:Inc., Oakland California, and supplied to Grand Gulf by Bechtel Power
                                      ' Corporation, _Gaithersburg, Maryland.
4.-     Nature of the. deficiency ... and the safety hazard which ... could be created .by such a deficiency . . . :
A. -        Description of the Deficiency 1 Rue deficiency involves ~ a condition with a spare piston skirt, heat' number W93-566G, which contains the potential for possible residual: stress. This condition was caused by improper heat
                                                 ' treating during manufacture.: _The residual stress in combination
                                                 - with operating stress could cause cracking of the' piston' skirt during operation of the diesel engine, which could resultfin -
engine failure.
1B.-         ' Analysis of Safety, Implications The spare piston. skirt is located in the warehouse, and ;was                 ,
                                                .-  availabin 'for use in either of1the 'two Delaval~ Unit?l standby -         _
                                              -. diesel eragines. Had the spare' piston skirt' been' used,1 failure of the: piston; skirt would have caused the. engine to be inoperable.
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Therefore, a failure' of L the _ engine could' result - in the diesel :
generator's inability _ to: perform itsL intended design ' functions _ in .
a                                     t the event of s a- LOCA.
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                ..                                                                                                                      Attachment to AECM-84/0213 Page 2 of 3
: 5.              The date on which the information of such deficiency ... was obtained.
Mississippi Power and Light received information of the deficiency on December 16, 1983, per Delaval letter to MP&L. An evaluation was performed and the deficiency was reported to Mr. R. Carroll, of your office, as a reportable deficiency for Unit 1 on April 2, 1984.                                              The MP&L " Responsible Of ficer," Mr. J. P. McGaughy, Jr. , will be notified when he returns to his office.
: 6.              In the case of the basic component                                      ...       the number and location of all such components.
There are two spare piston skirt assemblies at GGNS Unit 1. However ,
                                                 .only one spare piston skirt assembly, heat number W93-566G, was identified as being included in the suspect heat numbers identified by Transamerica Delaval. Other locations of defective components were listed by Transamerica Delaval in their notification letter to the NRC of October 28, 1982.
We do not have knowledge of the location of other defective equipment.
: 7.              The corrective action which has been-taken ... the name of the individual ... responsible 1for the action; and the length of time that
                                                'has_been ... taken to: complete.the action.
                                                -A.                 Corrective Actions Taken Material;Nonconformance Report (MNCR) .1029-83 hasibeen issued to-
                                                                   - document the nonconformance. A Plant' Quality hold tag has been
                                                                   . placed on the defective. piston skirt. The MNCR disposition is pending.directionLfrom Transamerica Delaval for return of'the defective piston 1 skirt for repair, nondestructive testing and
                                                                   . properiheat treating.
B.                 Responsible Individual Unit 1                        -
                                                                   -J.'E. Cross
:  Plant Manager ~
l                                   .                               Mississippi. Power .& Light Co.
C.               ' Length of Time- to Complete Actions-
                                                                                                                                                ~
The' defective: spare piston! skirt' will be returned ' to ; the vendor.
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                                                                   - upon MP&L's receipt of formal authorization.
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                                        'Any . advice related to the deficiency . .. that has been, is being, or
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                                       .will be given to purchasers or licensees:
                                       ' As the deficiency did not originate with MP&L, we have no advice to offer.
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