IR 05000483/1993009
| ML20046A247 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/21/1993 |
| From: | Burgess S, Wright G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20046A244 | List: |
| References | |
| 50-483-93-09, 50-483-93-9, NUDOCS 9307270141 | |
| Download: ML20046A247 (16) | |
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I U. S. NUCLEAR REGULATORY COMMISSION REGION III-l Report No. 50-483/93009(DRS)
Docket No. 50-483 License No..NPF-30 Licensee: Union Electric Company Post Office Box 149 Mail Code 400 St. Louis,-MO 63166-Facility Name: Callaway Nuclear Power Plant J
Inspection At: Callaway Nuclear Power Plant, Steedman, M0 Inspection Conducted: June 14 through July 2,1993
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Inspection Team:
S. Burgess, Team' Leader D. Calhoun Z. Falevits J..Neisler NRC Consultants:
G. Cha, Atomic Energy of Canada, Ltd. (AECL)
B. Pendlebury, AECL
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G. Skinner, AECL
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Approved By: bb k?'"
7-:o-33
.So.Dia D. Burgess, Team Leader Date-Region III A e/e # 4 Approved By: / en frey C. W'right," Chief 7/h/yf I
Date Engineering Branch
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Inspection Summary
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Insnection on June 14 throuah July 2.1993 (Recort No. 483/93009(DRS))
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Special electrical distribution system functional inspection in accordance with Temporary Instruction (TI) 2515/107(25107).
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Results:
The team determined the electrical distribution system was designed,
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operated, and maintained in an effective manner and engineering and technical _
support was good. A summary of strengths and weaknesses in system design and engineering support is provided in the Executive Summary. One unresolved item was identified regarding the lack of indicati_on of blown fuses for. containment isolation valves (Section 2.1.3).
One inspection followup item was identified regarding fuse control program implementation (Section 3.5).
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SUMMARY REPORTS ARE ACCEPTABLEL 147.
PROV DE THE FOLLOWING: CALCULATION B6, REV 3 CALCULATION 817, REV 1.
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IDENTIFY THE HIOMEST AND LOWEST SWITCHYARD VOLTAGE IN THE PAST 5 YEARS AND ANY M AJOR CH ANGES TO THE GRID IN THAT PERIOD.
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PROMDE TEST REPORT REOUIRED TO VALIDATE VOLTAGE CALCULATIONS PER BRANCH TECHNICAL POSITION PSS-1, PARAGRAPH S.4 160.
REFERENCE Q 144. SINCE ROOT CAUSE ANALYSIS TRAINING WAS LAST PERFORMED IN 1989.WHAT TRAINING MAS BEEN GIVEN TO NEW ENGINEERS HlRED AFTER THE 1989 TRAININGt 161 PROVIDE THE HVAC CALCULATION FOR LOOPAOCA OPERATION FOR THE ESSENTIAL SERVICE WATER (ESW1 SYSTEM PUMP ROOMS, 1E2.
PROVIDE THE ESW SYSTEM PUMP ROOM FAN TEST AND THE FAN CONTROL LOGIC.
163.
PROvlDE THE HYDRAUUC CALCULATION AND TEST VERIRCATION FOR THE ESW SYSTEM TO SUPPLY THE EDG COOLERS.
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PROVIDE A COPY OF SOS 924682.
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WHY !$ SECTION 3.2 (NCLUDED IN PflOCEDURE OTS-NK-1, REV 27 WHAT 13 THE SIGNIRCANCE OF THE REFERENCES TO VOLTAGES OF 112.8Vdc AND 106Vdct 163.
PROVIDE THE DROP-OFF VOLTAGE AND CDit RESISTANCE FOR GE RELAYS HF A, HGA, HMA, POTTER BRUMRELD KVP RELAY, AND STRUTHERS DUNN 219 RELAY.
167, IN CALCULATION NK48, PAGE 46, DOES THE GOULD SHAWMUT REFERENCE TO * TIME RESTRAINTS" REFER TO THE TIME FOR THE FUSE CURRENT TO REACH ITS PEAK VALUE OR TO THE TOTAL CLEARING TIME OF THE FUSE 7 168.
PROVIDE A COPY OF WESTINGHOUSE'S REPORT ON CALLAWAY*S FAILED INVERTER BOARDS AND A COPV OF A WE$TINGMOUSE LETTER REGARDING BOARD sMPROVEMENTS.
169.
PROVIDE THE FOLLOWING: til COPY OF BAYTERY CHARGER TROUBLE SHOOTING PROCEDURE. (2) COPY OF SOS 834077. (31 COPY OF VENDOR M ANUAL, (4) COPY OF CATS
FOR NK CHARGER BOARD REPLACEMENT Pue (6) CAPACITORS AND BOARDS LAST REPLACED,16] CAPACITOR PM,171HAS ENGINEER RECEIVED ROOT CAUSE ANALYSIS -
TRAINING?
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PROVIDE THE FOLLOWWG DATA REGARDING OVERLOAD HEATER SELECTION: (1) CALLAWAY CRITERIA OR GUIDEUNES FOR O.L SIZING,(2) DOES CRITERIA CONSIDER ALL OF THE FOLLOWING FACTORS AS APPUCABLE: la INCREASED CURRENT UNOEM LOW VOLTAGE CONDITIONS, (b) SERMCE F ACTORS, let TWO STARTS IN OUICK SUCCES$10N, (3)
PROVIDE ACTUAL DATA / CALCULATIONS FOR BOUNDING CASEtS) WHICH DEMONSTRATE ADEQUACY OF O.L SIZlNG (FON EXAMPLE, HIGH INERTIA LOADSI.
101.
PROVIDE A COPY OF MPE-22-ONOO1 AND CMP 964180, 162.
FSAR PG 9.4-78 USTS SUMMER AND WINTER AMBIENT TEMPERATURES AS 9?'F AND.1*F. FSAR TABLE 9.4-16 USTS THE TEMPERATURES AS 96*F AND 6*F, PLEASE CLARIFY THE DIFFERENCE.
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183.
REFERENCE: DG BUILDING AIR OPERATED EXHAUST DAMPER. THE EXHAUST DAMPERS ARE AIR OPERATED AND F AILS #N THE OPEN PostTION ON LOSS OF COMPRESSED AIR.
WAS THERE A SNGLE FAILURE ANALYSIS PERFORMED 7 $PECtRCALLY, WAS THERE THE POS9BtuTY OF EXCESS CDOUNG UPON FAILURE OF AIR SUPPLY 7 164.
WHEN POWER IS RESTORED TO THE SAFETY BUSSES FROM THE OFFSITE SOURCE FOLLOWING A LOOP 40CA, ADEQUATE VOLTAGE MUST BE PRESENT TO ASSURE THAT THE -
BUSSES ARE NOT SUBSEQUENTLY TR!PPED ON UNDER-VOLTAGE DUE TO VOLTAGE DROP RESULTING FROM STATION LOADING. WHAT MECHAN?SMS ASSURE THAT ADEOUATE VOLTAGE IS PRESENT A* THE SWITCHYARD PRIOR TO RE. TRANSFER? PLEASE IDENTIFY VOLTAGE LEVELS AND SUPPORTING CALCULATION IF AVAILABLE.
186.
PROVIDE A COPY OF RFR 8236 AND NMR $0-800162.
166.
REFERENCE SHORT CIRCUff CALC 22146. (1) DATA AND ASSUMPTIONS #12 STATES THAT CABLE REACTANCE AND RES' STANCE FOR CA3341,CA3276. CA3620. CA3328 ARE CALCULATED IN ATTACHMENT 1. THESE CALCS CDULD NOT BE FOUND. (2) CALC PROVIDES EQUIPMENT RATINGS AND FAULT DUTIES AT NOMINAL SYSTEM VOLTAGE RATHER TNAN AT M AX VOLT AGE tt.09 PU). JUSTIFY THAT THE CASES ANALYZED ARE THE MOST LIMITING. (3)lT WAS NOT CLEAR THAT THE CALC CONSIDERED THE CASE WHERE EDG tS TESTihG ON NB41. PROVIDE THE CALL STEPS THAT CLEARLY DEMONSTRATE THE EFFECT OF EDG TESTWG ON NB41.14)WHAT CABLE TEMPERATURES WERE ASSUMED FOR THIS CALC 7 167.
PROVIDE ALL ASSOCIATED WIRING PRINTS FOR E 23GM01, REV 4 $NCLUDING CHANGE DOCUMENTS).
168.
PROMDE ACTION PLAN 06 306 AND RFR 07481 RECARDING RESPONSE TO NRC INFO NOTICE 88 88.
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REFERENCE: DESIGN BASIS TORNADO. PROVIDE DESIGN AND CALCULATION OF TORNADO DAMPERS FOR THE INTAKE AND EXHAUST SYSTEMS FOR THE EDG RDOM, ESW PUMP ROOM. UHS ELECTRIC AL EQUIPMENT ROOM.
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170.
REFERENCE: DIFFERENTIAL PHESSURE TEST #P620601. THE REFERENCED TEST INCLUDED TRENDING CURVES FOR ESW FLOW AND HEAT EXCHANGER DIFFERENTIAL PRESSURE FOR BOTH DIESELS. (1) PROVIDE EXPLANATION FOR THE DEGRADATIONS AND WHAT WAS DONE TO RESTORE THE PARAMETERS 7 (2) HOW WAS THE MWIMUM REQUIRED ESW FLOW ESTABUSHED?
171 PROVIDE FROM THE 1992 ISEG LOG: SEGR #9243406,9247406. 92-11418,9346-006. FROM THE OE JOURNALS: SEGR #9212406,9344403,9346406. 8343401.
ALSO PROMDE ISEG ISSUES LOGS DATED 8/4/92,9/1/92,1/11J83, AND 6/13/93.
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DG HX TEST REPORTS REVEALED 2 PROBLEMS AREAS: PERSISTENT PLUGGING OF THE DG HKa BY COOUNG TOWER DEBRIS AND LACK OF ACCURATE TEMPERATURE MEASUREMENTS FOR HX PERFORMANCE ANALYSIS. 413 WHAT IS SDNG DONE TO MINIM 12E THE DEBRIS CARRYOVER? (28 WHAT DESIGN MARGINS ARE AVAILABLE IN THE -
HXe f.E. HOW M ANY TUBES FOR E ACH HX CAN BE PLUGGED BEFGHE THE PERFORM ANCE 15 IMPACTED? (3) WH AT IS THE HIGH dP AND MINIMUM FLOW CRITERI A AND HOW WERE THESE ESTABUSHEDP 14) THE PERMANENT INSTALLATION OF RTDs t$ SCHEDULED FOR 10/94. WHY SO LATE 7 173, PROVIDE LAST COMPLETED COPtES OF PROCEDURE MPE-22 OYD06, MPE-22-OSOO6 FOR BREAKER 162N80113.
174.
REFERENCE CALC B 10. VOLTAGE DROP fN CONTROL CIRCUITS. fil ASSUMPTION 3 STATES CONTROL CIRCUlT WIRE TEMPERATURE 18 80*C. ARE CONTROL CIRCtsTS IN PLANT AREAS WHERE ABNORMAL OR ACCIDENT ENVIRONMENTS COULD CAUSE CONDilCTOR TEMPERATUFtES TO EXCEED THis NGURE? IF $0. JUSTIFY THAT ALCWABLE CIRCUtf LENGTHS ARE NOT E ttCEEDED. (2) ASSUMPTION 6 $TATES THAT RESIST ANCE OF FUSES AND SER:ES CONT ACTS 4S NEGLECTED $1NCE THE MARGIN l$ A880RDED BY THE 80*C AOSUMPTION TMe$is NOT CONSERVATIVE BECAUSE:{al THE 60*C ASSUMPTION MAY NOT BE CONSERVATfVE tTSELF, thi SERIES RESIST ANCE FACTORS WERE NOT QUANTIFtED AND COMPA :ED AGAINST CONDUCTOR TEMPERATURE EFFECTS TO EVALUATE RELATIVE IMPORT ANCE. SEmiES REST $TANCE COULO BE INTROCvCED BY RELAY AND SWITCH CONTAC S. WIRE T[ftMW ATIONS.
176.
IN CALCUL ATION NK 07 TVF If IS A REFERENCE TO FIEPLACING FUSES IN THE POWER SUPPLIES BY TYPE MDA-30 FUSES. WWY IS THIS NECESSARY, HAS IT SEEN COMPLETED, AND IS COONX \\ TION MAfNTAINED7 178.
WHAT IS THE FUNCTION OF Th CABLE THAT RUNS IN C ABLE 1 RAY 6JSA38 THROUGH THE WALL IN UPPER CABLE $PREADiNG ROOM 7 DOES THE PENETRATION M!ET THE -
APPROP8t: ATE REQUIREMENTS E ' APPENDIX RF 177 tN THE RED DG ROOM. DOES THi MNT INSTRUMENT YUBWG JUST AllOVE THE FLOOR GRATING 16-8 TUBEst HAVE ANY ADVERSE Ef f ECTS ON THE DG OPERATION' SHOULD THE TUf$ LNG BE PROTECTED TO 4 EVENT STEPklNG ON ITF 178.
PROVIDE A COPY OF THE L AS".:OMPLETED CAUBRATION OF THE DG OVERSP[ED TRfP. WHAT IS CALIBRATION FREQUENCYf
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