ML16341D064
| ML16341D064 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/17/1985 |
| From: | Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8501230388 | |
| Download: ML16341D064 (12) | |
Text
J.
D. Shiffer, Vice President Nuclear Power Generation Pacific Gas.and Electric Company 77 Scale Street San Francisco, California 94106
Dear Sir:
~+@pZZg 00PX The allegations listed below are being directed to PGSE for evaluation, investigation, and response.
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- 1494, 1501,
- 1502, 1503,
- 1504, 1507,
- 1508, 1509)
- 1510, 1511,
- 1512, 1519, 1520)
- 1521, 1522,
- 1525, 1527,
- 1528, 1530,
- 1531, 1532)
- 1533, 1534,
- 1541, 1542)
- 1544, 1557) 15589 1560 Attached is a printout from our Diablo Canyon allegation file system that provides the specific allegation information, along with any allegations that may be with PG&E for response.
For each specific allegation or concern forwarded by this letter, the NRC must be apprised, in writing, of the results of the PGRE investigation, the necessary corrective action, and the expected completion date.
We request that your responses be titled with the appropriate allegation or concern number.
Your responses will be evaluated by the staff for clarity, comprehensiveness, and substance.
The responses are subject to verification by the staff.
You will be advised of the staff's position upon completion of the staff's evaluation.
Your written response is required within 30 days of receipt of this letter.
If you have any questions, or require additional information, please call the Region V office.
Sincerely, N@fnaf 'sfgrteg t;y F. Kirsch D. F. Kirsch, Acting Director Division of Reactor Safety and Projects RV/dot CRO Y
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PAGE NO.
1 01/08/85 ALLEGE ATSd KEYPHRASE RESP DIABLO CANYON ALLEGATIONS CLOSE REF SOURCE CHARACTERIZATION 0951 RV84A064 WELD INSPECTION 1119 RV84A064 IHPROPER INSTALLATION RV-P RV-P T17 4/7/84 P185-13 T18 4/10/84 F139 SOME "RAT HOLE" WELDS WERE NOT INSPECTED WITH NDE BECAUSE A SUPERVISOR SAID THAT THEY WERE INACCESSABLE A QA INSPECTOR SAYS THAT THEY COULD HAVE BEEN INSPECTED HANGER 58N-4R HAS TUBE STEEL WELDED TOGETHER WITH QUARTER INCH FILLET CAPS ON BOTH SIDES 1313 RV84A071 HISC INDIV CONCERNS 1329 RV84A071 HISC INDIV CONCERN 1330 RV84A071 ANCHOR BOLTS/ BOLTING 1331 RV84A071 ANCHOR BOLTS/ BOLTING 1336 RV84A071 ANCHOR BOLTS/ BOLTING 1480 RV84A113 MELDING/ PRACTICES RV-P RV-P RV-P RV-P RV-P RV-P 6/21/84GAP//185 6/21/84GAP8146 6/21/84GAPg145 6/21/84GAP8144 6/21/84GAP8139 ADF 9/5/84 THE 1/24/84 AND 2/15/84 POLICY WAS USED TO BLOCK HARDWARE PROBLEHS FROH BEING REDLINED ONTO THE AS-BUILT DRAWINGS PROCEDURES ARE DEFICIENT FOR FISHPLATES.THERE ARE NO CHECKS ON HOLE SIZE BY gC ON 12/28/83 ESD CHANGED THE REgUIREHENTS SAYING WASHERS ARE TO BE USED ON SAFETY-RELATED HILTI BOLTS. HOWEVER, THIS MAS NOT RETROACTIVE SO ALL UNIT 1 AND MOST OF UNIT 2 HILTI BOLTS HAVE NO WASHERS.
UNTIL 12/83 HILTI BOLTS WERE INSTALLED WITHOUT WASHERS IN UNIT 2.I BELIEVE THE SANE THING OCCURRED IN UNIT l.
TORgUING HILTI ANCHOR BOLTS THAT CONNECT SAFETY-RELATED PIPE SUPPORT BASE PLATES TO CONCRETE IS NOT ADEQUATELY CONTROLLED.SHIHS WERE USED BUT THERE WAS NO PROCED~
DICTATING THEIR USE.
FISH PLATES ON STEAN GENERATOR SUPPORTS DON'T SEEM TO BE ADEQUATE
PAGE NO. 2 01/08/85 DIABLO CANYON ALLEGATIONS AILEGd ATSt KEYPHRASE 1481 RV&4A113 WELDING/ PRACTICES 1482 RV&4A113 MELDING/ PRACTICES 1483 RV&4A113 BEAM CLAMPS 1484 RV&4A113 BEAM CLAMPS 1487 RV84A113 DESIGN 1492 RV&4A114 TRAINING 1494 RV&4A114 QA/QC 1501 RV&4A114 WELDING/ PRACTICES 1502 RV&4A114 WELDING/ PRACTICES 1503 RV&4A114 WELDING/ PRACTICES 1504 RV84A114 WELDING/ PRACTICES 1507 RV&4A114 MISC INDIV CONCERNS RESP RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P SOURCE ADF 9/5/84 ADF 9/5/84 ADF 9/5/84 ADF 9/5/84 ADF 9/5/84 ll/1/84GAP 11/1/84GAP 11/1/84GAP ll/1/84GAP ll/1/84GAP ll/1/84GAP 11/1/84GAP CLOSE REF CHARACTERIZATION ECCENTRICALLY EXTRUDED PIPE DISCOVERED BY UT DCN-1541-001 SHEAR LUGS NOT FULL PENETRATION WELDS UNIT 2 ISO.
DESIGNATION 2-14-82 UNISTRUT CLIPS NOT ADEQUATE ON LINES 2-5-22-3/4 AND 2-5-18-3/4 CONTAINMENT SPRAY CLAMP NOT TIGHT ON 73-44SL MGER (ON NPPR DC2-83-MM"P0196)
HAD TO BE MADE REMOVABLE IN ACCORDANCE WITH PARAGRAPH 3.1.3 OF M"9~
CRITERIA BECHTEL MANUAL. BECHTEL DOESN'T CONSIDER~
CRITERIA IN THEIR DESIGN PULLMAN PIPING ENGINEERS RECEIVED NO QA/QC TRAINING.
THEY ASSUMED THAT THE ENGINEERS WERE FAMILIARWITH THE PROFESSIONAL CODES FOR MANY YEARS PPP QC INSPECTORS HAD BEEN ACCEPTING FULL PENETRATION WELDS THAT CANNOT BE ACHIEVED DUE TO THE REQUIRED BEVEL ANGLE THE STANCHION REPAIR CREATED CARBON CONTAMINATION WITHIN THE RCS DUE TO CARBON ARCHING. PCS LIFTED A PROHIBITION OF CARBON ARCHING TO MAKE THE REPAIRS FISHPLATES WERE GROSSLY TOO THIN DUE TO UNDERLENGTH STUDS PROTRUDING FROM THE CONCRETE DEFECTIVE FISHPLATES IDENTIFIED IN ALL FOUR STEAM GENERATORS IN UNIT 2 ARE ALSO DEFECTIVE IN UNIT 1 EVERYONE AGREED THAT THE FISHPLATES LOOKED WRONGs B
NO ONE DID ANYTHING~OUT IT THERE MAY BE EXTRANEOUS MATERIAL IN THE CONCRETE AT INTAKE STRUCTURE
~'l
PAGE NO. 3 01/08/85 DIABLO CANYON AI,LEGATIONS ALLEGE ATSg KEYPHRASE 1508 RV84A114 IMPROPER INSTALLATION 1509 RV84A114 IMPROPER INSTALLATION 1510 RV84A114 IMPROPER INSTALLATION 1511 RV84A114 IMPROPER INSTALLATION 1512 RV84A114 DESIGN 1519 RV84A114 MELDING/ PRACTICES 1520 RV84A114 DRAWINGS/ DOCUM CONTROL 1521 RV84A114 IHPROPER INSTALLATION 1522 RV84A114 IMPROPER INSTALLATION 1525 RV84A114 WELDING/ PRACTICES RESP RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P SOURCE 11/1/84GAP 11/1/84GAP 11/1/84GAP 11/1/84GAP 11/1/84GAP ll/1/84GAP 11/1/84 GAP ll/1/84GAP ll/1/84GAP 11/1/84GAP CLOSE REF CHARACTERIZATION THERE IS A VOID BETWEEN THE LINER PLATE AND THE CONCRETE FACE THAT IS 20 FEET LONG AND 10 FEET TALL WITH AN UNKNOWN DEPTH IN UNIT 2 CONTAINMENT. THIS WAS REPORTED TO MGMT BUT NOT CHECKED THE REINFORCEMENT BAR INSIDE THE CONCRETE WALLS IS RUSTING IN THE INTAKE STRUCTURE PGSE'S REPAIR TO THE RUSTED REBAR WEAKENS THE STEEL SKELETON OF THE CONCRETE THERE IS A CRACK THROUGH THE CONCRETE FLOOR SLAB ALONG THE CENTER LINE OF THE CIRCULATING WATER PUHPS IN T)~
INTAKE STRUCTURE.
PGSE KNEW BUT DID NOT TAKE CORRE~
ACTION A DESIGN FLAW IN THE INTAKE STRUCTURE THREATENS THE ISOLATION +H) INDEPENDENCE OF UNIT 1 FROM UNIT 2--COMHON AIR SUPPLY LINE FOR ASW SUMP LEVEL INDICATORS FULL CORRECTIVE ACTION ON PARAMOUNT PURCHASES WAS NEVER CARRIED OUT--SOME OF THE PARAHOUNT SHEAR LUGS ARE STILL NOT PROPERLY WELDED DRAWINGS ARE INCORRECT AND DO NOT REFLECT THE TRUE AS-BUILT CONDITION AT THE PLANT, REGARDING SHOP WELDED PIPE SUPPORT STANCHIONS INADEQUATE SUPPORT FOR REACTOR HEAD GASKET MONITOR LINES AND AN INADEQUATE FOLLOW-UP BY PGSE MANAGEMENT AFTER IDENTIFICATION ALLEGER IDENTIFIED A LOOSE CLAMP ON THE CONTAINMENT SPRAY SYSTEM (SPECIFIC LOCATION NOT PROVIDED).
IDENTIFIED TO PPP/PGSE ON 12/28/83 BUT WAS NOT CORRECTED.
AN ANCHOR WITHIN THE REACTOR COOLANT SYSTEM AHS BEEN DAMAGED DUE TO EXCESSIVE WELDING. ANCHOR ON LINE 13,
~, ~
PAGE NO. 4 01/08/85 ALLEGJJ ATStJ KEYPHRASE 1527 RV84A114 IHPROPER INSTALLATION 1528 RV84A114 DESIGN 1530 RV84A114 DESIGN 1531 RV84A114 WELDING/ PRACTICES 1532 RV84A114 ANCHOR BOLTS/ BOLTING 1533 RV84A114 MISC INDIV CONCERNS 1534 RV84A114 IMPROPER INSTAILATION 1557 RV84A115 IMPROPER INSTALLATION 1542 RV84A114 INSPECTOR QUALIFICATION 1544 RV84A115 MISC INDIV CONCERNS RESP RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P RV-P DIABLO CANYON ALLEGATIONS CLOSE REF SOURCE ll/1/84GAP 11/1/84GAP ll/1/84GAP ll/1/84GAP ll/1/84GAP ll/1/84GAP 11/1/84GAP ll/1/84GAP 10/15/84 INTERVIEW 11/15/84GAP B5 CHARACTERIZATION WELDED ON 4 TIMES INSTEAD OF 3 TIMES> THE MAXIMUM ALIOWED A PARAMOUNT SPOOL (PIPE)
WAS ECCENTRICALLY EXTRUDED PTGC FAILED TO FOLLOW SECTION 3.13 OF ITS OWN M-9 DESIGN CRITERIA MANUAL THERE WERE TOO MANY TEMPORARY HANGERS IN PLACE FOR SHALL-BORE PIPING AROUND THE RCPs WITHIN CONTAINMENT WITHIN UNIT 2 CONTAINHENT, AN INDIVIDUALOBSERVED UNACCEPTABLE IMPURITIES IN THE ARGON THAT CAME FROM ARGON HEADER THE NUTS THAT ARE INSTALLED FOR U-BOLTS THAT SUPPOkT PIPING CONNECTED TO THE CARBON DIOXIDE TANKS AT INTAKE>
ARE INSTALLED SUCH THAT THEY COULD POSSIBLY DAHAGE DELICATE SHALL-BORE LINES THE UNSECURED STATUS OF THE CHLORINE TANKS COULD PREVENT CRITICAL HEAT TRANSFER ONE OF THE CAUSES FOR POOR QUALITY, SLOPPY WORK AND STOP-GAP SOIUTIONS WAS THE SPECTRE OF UNREASONABLE DEADLINES THAT "MUST BE MET" TO AVOID SHUTTING THE PLANT DOWN INADEQUATE QC INSPECTOR TRAINING STAINLESS PIPE FITTINGS> SILVER BRAISED> ON THE liNIT 1 BORIC ACID TANKS, LEAKED AND WERE NOT REPAIRED. THIS WAS REPORTED TO THE HOTLINE A FIELD ENGINEER DISCOVERED THROUGH SOUNDINGS A VOI~
BETWEEN THE CONCRETE LINER AND CONCRETE FACE
4
PAGE NO. 5 01/08/85 ALLEGE ATS8 1558 RV84A115 IHPROPER INSTALLATION 1560 RV84A115 IHPROPER INSTALLATION RESP RV-P RV-P DIABLO CANYON AILEGATIONS SOURCE CLOSE REF 11/15/84GAP B6 11/15/84GAP B8 CHARACTERIZATION THE EFFECTS OF INADEQUATE INSTALLATIONPROCEDURES ARE ILLUSTRATED BY A LOOSE CLAHP ON THE CONTAINHENT SPRAY SYSTEH REACTOR HEAD GASKET HONITORING LINES ARE IHPROPERLY SUPPORTED