ML20054B994
| ML20054B994 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 03/25/1982 |
| From: | Wigginton D COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20054B982 | List: |
| References | |
| 0335R, 335R, NUDOCS 8204190356 | |
| Download: ML20054B994 (17) | |
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COMMONWEALTH EDISON 4
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ZION STATION UNIT 1 "D" STEAM GENERATOR j.
RECOVERY PROGRAM t
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MARCH 25, 1982 t
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a CECO /NRC PRESENTATION 3/25/82 PART I A.
Introduction B.
"D" Steam Generator Status Components Involved Schedule for Inspection and Recovery C.
Tube End Evaluation Discussion of the Westinghouse Evaluation Westinghouse Test Program Conclusion D.
Recovery Program
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Westinghouse Discussion of Equipment E.
Summary PART II A.
Zion Eddy Current Results B.
Plugging Criteria C.
Row I Discussion D
Summary 0355r
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COMPONENTS INVOLVED l
l ALUMINUM N0ZZLE COVER PLATE
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3 PIECES OF ALUMINUM i
2 HINGES 36 bolts, WASHERS, Nuts 4
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ZION STATION "D" STEAM GENERATOR RECOVERY SCFEDULE Activity March ADril 21 22 23 24 25 26 27 28 29 30 31 1234567891011121314151617181920212223242526
- 1. EC - HL & CL y-
- 2. He Test
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- 3. Manual Operation
- 4. Auto Operator z
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- 5. Coaplete EC
- 6. Plug Tubes
- 7. Install Manways
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e ZICN TUBE /IUBESHEET PHOTO EVALUATION i
INVESTIGATE 1 X PIDIOS SELECT 190 LOCATIONS FOR FIRST REVIBi t
INVESTIGATE 21 X PHOIOS FOR 190 LOCATIONS 9
SELECT 18 EDCATIONS FOR SECDND REVIEf
' r INVESTIGA'E 5 X PHOIDS FOR 18 LOCATIONS NO APPARENT KT.LD DEGRADATION i
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No. 5 1
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I HARD ROLL 2-1/4" I
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(1) TACK ROLL: 40 IN.-LB. X 3/4" LG (2) HEE (3) HARD ROLL: 80 IN.-LB. X 2 1" LG WBE END MANUFACIURING CEFIGURATICN FIGURE 1.
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1 MAX. AVAILABLE I.D. >.726" l
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LIGHT DEFORe TUBE END
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MAX. AVAILABLE I.D >.642" y
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MEDnN DEFOMED TUBE END
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MAX. AVAILABLE I.D. <.642" (f
- l HEAVY DEFORMED TUBE END FIGURE 3.
- REI END FRWTION CDNDITIONS No.3 m
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REPAIR PROCESS DEVELOPMENT _
DAMAGE TEST (ON TUBE /1UBESHEET FOCK-UP WITH PLUG REMNED)
TEST I.
1.
DAMAGE DUPLICATION: INWARD DEFORMATION 6 FATIGUE DEF 2.
INSPECTION: MiOIOGRARIY, X-RAY, METALLURGICAL SECTIONING 3.
NO CRACK SH0hN ON WELD AREA REPAIR TEST (ON TUBE /IUBESHEET MIK-UP RELEASED BY Q.A.)
TFST II. -
1.
DAMAGE DUPLICATION: SIMILAR 10 'IEE PHOIOS AS SEEN IN 2 ION PLAVT.
1 HARD ROLL 120 IN.-LB, X 11'LG 2.
REPAIR:
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INSPECTION: PHOIOGRAPHY, METALLURGICAL SECTIONING NO CRACK SH0hN ON WELD AREA, NO WALL 1EINNING EXCEED 7%.
4.
TEST III. - REPAIR PROCESS QUALIFICATION TEST QUALIFY THREE OPTIONAL REPAIR PRON W R 1.
2.
INSPECTION: PHOTOGRAPHY, P.T. TEST NODEGRADATIbNONKELDAREA 3.
TEST IV. - I.D. INVESTIGATION TEST ASSUME NO HARD ROLL AFTER WELDING TUBE END 1.
TUBE END HARD ROLLED PER REPAIR PROCESS AT 120 IN.-L 2.
I.D. MEASUREMENTS SHOW NO SIGNIFICANT DIFFERENCE 3.
ON 1UBES WI1H H.R. AND 'IUBES WITHolTT H.R.
TEST V.
- PULL OCTT TEST 1.
NO WELD ON TUBE END 2.
PULL OUT IBAD IS GREATER THAN 3000 LBS.
NO. 4
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REPAIR HARD ROLL: 120 IN.-LB. X 11"LG I
FIGURE 2.
1UBE END REPAIR CNFIGURATION o
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O CONCLUSIONS A. THE IMPACT TO THE ZION UNIT I STEAM GENERATOR D INLET TUBE ENDS, CAUSED BY THE INLET PORT COVER, WAS RELATIVELY MINOR AND CONSISTED PRIMARILY OF BENDING DEFORMATION TO SOME OF THE TUBE ENDS. SUCH IMPACT DOES NOT APPEAR TO BE SUFFICIENT TO COMPROMISE THE HEAT TRANSFER CAPABILITY OF THE UNIT.
B. BASED ON VISUAL EXAMINATIONS, PHOTOGRAPHIC EVALUATIONS, AND LABORATORY TESTS, NO TUBE TO TUBESHEET WELD CRACKING IS EXPECTED AND NONE HAS BEEN OBSERVED IN THE INVESTIGATION TO DATE.
C. THE OBSERVED BENDING OF THE TUBE ENDS WILL NOT RESULT IN A SIGNIFICANT INCREASE IN THE FATIGUE USAGE FACTOR.
RECOVERY PROGRAM PURPOSE:
MINIMUM:
1.
REPAIR TUBE ENDS WHICH COULD RESULT IN FUTURE TUBE FRAGMENTS 2.
RESTORE R0W 1 TUBE ENDS TO ACCEPT TUBE PLUGS OR EDDY CURRENT PROBE, i'
DESIRABLE:
RESTORE ALL TUBES TO ACCEPT A TUBE PLUG OR EDDY CURRENT PROBE I
MANUAL PROGRAM:
REPAIR /RESTOREa 68 TUBES ENDS OUTSIDE THE BOUN e
OF THE AUTOMATED SYSTEM 9' MACHINED it HARD ROLLED a'
4/ 59ARD ROLLED AUTOMATED PROGRAM e RESTORE %r 1100. TUBE ENDS f INSPECTION: MANUAL PROGRAM PLUG GAGE l TV AUTOMATED PROGRAM PLUG GAGE l
l RoiTFPS[ D LIGff IW%GED TtE ENDS = 10, 840 2) EDIlf11W%GE0 TUBE 80S A) EPEE STEP R0GSS D P9t1 TtE 99 USING t0, 832
- 2) OWlE TO 10lJfR f0. 834
- 3) OWlE TO PDUIR fn, 840 I
j ER EAVILY IW%ED RE B0 t A. ljSE SLIE RVtER B.' USE NO 832 PDUfR C. USE NO. 834 f0LifR D. USE to. 840 R0llER e 4 i
ZION STATION - UNIT 1
SUMMARY
OF EDDY CURRENT AND HELIUM LEAK TEST RESULTS R0W L ll-BEND TANGENT STM. GEN. HELIUM E/C INDICATIONS INDICATIONS 100% 40-99% 20-39% A 4 2 B 6 2 1 C 9 4 D NOT YET, TESTED TOTAL 19 8 1 0 ALL OTHER LOCATIONS STM. GEN. HELIUM E/C INDICATIONS INDICATIONS 100% 40-99% 20-39% 12 2 l A 2* B 11 10 C 1* 6 1 D NOT .YET TESTED TOTAL 3* O 29 13 i
- SUSPECTED LEAKERS I
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ZION STATION - UNIT 1 TUBES WITH CONFIRMED DEFECTS + MARCH 1982 STM. GEN. R0W 1 OTHERS J A 4 14' B 7 11 C 9 7'* D NOT YET TESTED i TOTAL 20 32
- Tw0 TusEs SUSPECTED HE LEAK
- ONE TUBE SUSPECTED HE LEAK
+ "CONFIRMEDDEFECT" DEFINED As 40% OR GREATER OR EVIDENT LEAKER
ZION STATION TUBE PLUGGING CRITERIA MARCH 1982 ALL TUBES WITH DEFECT INDICATIONS 40% OR GREATER THROUGH WALL PENETRATION PER TECHNICAL SPECIFICATIONS, WITH THE FOLLOWING ADDED CONSERVATISMS: A. R0w 1 AND 2 U-BEND TANGENT POINTS -- ANY EDDY CURRENT INDICATION B. ANTI-VIBRATION BAR (AVB) LOCATIONS -- ANY IUBE WITH 20% OR GREATER IHROUGH - WALL PENETRATION C. TUBE SHEET LOCATIONS -- ANY SEVERELY DISTORTED (" SQUIRREL") INDICATION D. ALL LOCATIONS -- ANY TUBE SHOWING EVIDENCE OF LFAKAGE l l
__.__=_____.m.- _m 2m 2 _._a m l l i ,e ZIONSTATION-UNIT 1 TUBES TO BE PLUGGED (CONSERVATIVE CRITERIA) l MARCH 1982 STM. GEN. R0W 1 OTHERS A 13 18 B 7 25 C-10 9 D NOT YET TESTED TOTAL 30 52 l
"'-?;yM3R{g'g ZION STATION - UNIT 1 TUBES TO BE PLUGGED OTHER THAN R0W 1 S/G
- POSS, ATE AVB TSP RESTRICTED TOTAL HELIUM A
2 3 7 6 0 18 B 0 7 16 3 1 25 i C 1 1 4 3 0 9 D 1 i .}}