ML20247R088
| ML20247R088 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/18/1989 |
| From: | Mccurdy H BALTIMORE GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20247R084 | List: |
| References | |
| NUDOCS 8909290174 | |
| Download: ML20247R088 (200) | |
Text
{{#Wiki_filter:. CALVERT CLIFFS NUCLEAR POWER PLANT BASIS FOR DETERMINATION - Unit 1 Safe Operation Relative to Unit 2 Pressurizer Heater Sleeve Leakage i i September 16,1969 J Prepared by: b lod \O ' h H. William McCurdy, MPIR Associates, Inc. l Reviewed by: IbN ' (ame . Neste11, MPR Associates, Inc. Approved by: D' T. M. Khan, Baltimore Gas and Eleccric
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i 1 l I Table of Contents A.
SUMMARY
B. OPERABILITY EVALUATION FOR UNIT 1
- 1. Cracking in the Unit 2 Pressurizer Penetrations
- 2. Examination cf the Unit 1 Penetrations
- 3. Comparison of the Unit I and 2 Pressurizer
- 4. Operating Histories for Units 1 and 2
- 5. Safety Evaluation for Unit 1 C. DESCRIPTION OF PRESSURIZER AND PENETRATIONS
- 1. Overall Description
- 2. Penetration and Nozzle Fabrication / Installation History D. INSPECTION AND EVALUATIONS
- 1. Visual Inspections for Leakage
- 2. NDE (PT, ET) Inspections
- 3. Metallurgical Evaluations
- 4. Reactor Coolant System Water Chemistry Evaluations
- 5. Fracture Mechanics Evaluation
- 6. Upper-Bound Leak Rate Evaluation E. APPENDICES
- 1. Materials Testing and Evaluation Report 4
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A.
SUMMARY
. Crackino in the Unit 2 Pressurizer Penetrations On May 5, 1989, weepage-type leakage was detected in 20 pressurizer heater penetrations by visual examination of the Calvert Cliffs Unit 2 pressurizer lower head. In addition, one instrumentation (upper level / pressure tap) nozzle was found to be leaking in that unit. In all cases, evidence of leaking was the presence of boric acid crystal deposits at the penetration.
Results of destructive and nondestructive examinations of the heater sleeves indicate that the leaks result from axial cracks, less than 1-1/2-inch long, that lie in the vicinity of the attachment "J" weld at the pressurizer inside surface. Metallurgical evaluations showed
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the sleeve cracks to be intergranular and to originate from the sleeve I.D. (wetted) surface. No circumferentially oriented cracks were detected. The cracking was most likely caused by " primary water" stress corrosion since the material microstructure and processing history suggests a susceptibility to this form of attack. Nondestructive examination of the instrumentation nozzle showed three axial cracks, each less than 3/4 inch long, extending along the I.D. (wetted) nozzle surface from the pressurizer inside surface.
.- - - - - - -- --. - - _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _d
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- Destructive' examination was not performed, however, it is likely that these cracks are intergranular and the result of " primary water" stress corrosion cracking since the processing history for the nozzle J
material suggests a susceptibility to this form of attack.
. Examination of the Unit 1 Penetrations Visual examination of the heater and instrumentation penetrations in the Unit 1 pressurizer revealed no signs of leakage. In addition, nondestructive examinations showed no evidence of cracking. The examination methods used were identical to those which reliably detected defects in the Unit 2 pressurizer.
. Safety Evaluation for Unit 1 Based on the results of the examinations and evaluations and on the similarities between the Unit I and Unit 2 pressurizer and environmental conditions, the possibility that cracking of the Unit I heater sleeves or instrumentation nozzles will occur during future plant operation cannot be dismissed. Therefore, to be conservative, an evaluation was performed to assess we operability of Unit I with
- the potential for future leakage in the heater sleeves or instrumentation nozzles. The results of the assessment are summarizeo
. i below: I l
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- Potential cracks in the Unit I sleeves / nozzles are expected to be axially oriented and reach a maximum of about 1-1/2-inch in length, as observed in Unit 2. f i
A fracture mechanics assessment of the cracks indicates that the cracks are mechanically stable with ample margin under pressure loads. Flaws about 1-inch in through-wall length are expected to leak under normal operating conditions at a rate of about one gpm which is easily detectable by the containment leakage monitoring system. This flaw size is within the fracture mechanic; tability limit. Based on this assessment, it is concluded that the presence of potential axial cracks in the Unit 1 pressurizer heater sleeves and nozzles is not a safety concern and poses no threat to the structural integr'ity of the pressurizer. Coolant leakage from what is judged to be a typical flaw (1/2-inch through-wall in length) will be at a low rate, less than 0.1 gpm, which would not normally be detectable by the containment leakage nionitoring system. This is consistent with the low leakage rate observed at Unit 2 where boric acid crystal buildup was limited and there was no evidence of steam cutting in the pressurizer head bore hole surrounding the sleeve. However, long term operation with A-3 m _. , e s _ - , . . , j
undetected leaks is not desirable due to the potential for eventual steam cutting or boric acid carrosion of the pressurizer head. Therefore,-the In-service Inspection Program will be modified to require visual inspection of every pressurizer penetration potentially subject to leakage during every refueling outage in addition to all other inspections such as the boric acid corrosion inspections, Class I system hydrostatic tests and reactor coolant system leakage testing. e e A-4 m-w:a.w.en .; ~..,:.. - - - . >. -- .-~.~~n-~a ~~n.~ m - a w,
B. OPERABILITY EVALUATION FOR UNIT 1
'I. Crackino in the Unit 2 Pressurizer Penetrations Weepage-type leakage has been detected in 20 pressurizer heater penetrations by. visual examination of the Calvert Cliffs Unit 2 .. pressurizer lower head. In addition, one instrumentation (upper i
level / pressure tap) nozzle was found to be leaking in that unit. In all cases, leakage was determined by observing the presence of boric acid crystal build up at the penetration. Heaters were removed from . 28 penetrations (including the 20 penetrations known to be leaking). Indications were detected in 18 of the heater sleeves by liquid penetrant testing or initial eddy current testing. Later eddy current inspections with a modified technique of 16 sleeves found defects in all sleeves tested which were known to be leaking. Two sleeves were removed by cutting below the sleeve-to-clad "J" weid and were examined destructively. One sleeve was removed in a core bore that included the "J" weld and ferritic base metal. The core bore was also destructively examined. l j l i
o f Results lof destructive and nondestructive examinations of the sleeves and' nondestructive examination of the instrumentation nozzleLindicate that theI eaks l result from axial; cracks, all of wh'ich are~less than lal/2-inch long, that lie in the vicinity of the. attachment "J" weld. Metallurgical evaluations showed the sleeve cracks to be'intergranular R and to originate from the sleeve I.D. (wetted) surface. No circumferentially oriented cracks were detected. The heater' sleeves are Inconel 600 (SB 167) manufactured' by INCO. A
- review of the sleeve mill certification data and a metallurgical evaluation of the sleeve materia 1' indicate that the sleeves have a microstructure and processing history that made the material susceptible to " primary uater" stress corrosion cracking. Modified Huey tests showed the s.aterial is not sensitized to cracking in
- aerated water or other oxidizing environments. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS), and Auger Electron Spectroscopy (AES), identified no chemical contaminants on the sleeve fracture surfaces. Also, examinations indicated that the i.D. surface of the sleeves near.the "J" weld had been reamed which resulted in some additional degree of cold working of the I.D. surface in the vicinity of the cracks. Evaluation of the ferritic steel base metal in the core bore sample showed less than 0.030" corrosion attack and no steam cutting of the bore surface. No damage to the carbon steel vessel head was detected by visual examination of the bottom surface.
1 ' B-2 m .ra_a . . l m -- _ __ _ _ _ _ . . _ _ _ _ _ _ _ ._________________._________z___J
Based on the nondestructive and destructive evaluations performed to date on sleeve material removed from the Unit 2 pressurizer, it is concluded that the sleeve leaks were caused by intergranular stress corrosion cracking. Further, the cracking was most likely " primary water" stress corrosion cracking since the microstructure and processing history of the removed material suggests a susceptibility to this form of attack. The reaming operation which was performed during the Unit 2 pressurizer fabrication may have contributed to residual stresses and therefore to the cracking susceptibility. The instrumentation nozzles were machined from Inconel 600 (SB 166) bar stock which was supplied by INCO. Results of the nondestructive examinations of the leaking upper level nozzle showed three axial cracks, with a maximum length of 3/4 inch, extending along the I.D. surface of the nozzle from the inside of the pressurizer.' Although metallurgical evaluations of the leaking nozzle were not performed, based on the material processing history the likely cause of failure was " primary water" stress corrosion cracking. Also, as noted in manufacturing documents extensive rework machining was performed on the Unit 2 upper level / pressure nozzle I.D. surface. This may have increased the residual stresses increasing its susceptibility to cracking. B-3 i
- 2. Examination'of the Unit 1 Penetrations Visual examination of all heaters and instrumentation penetrations in the Unit I pressurizer revealed no signs of leakage' . In addition, twelve heaters were removed and nondestructive examinations (visual, eddy current, liquid penetrant) were performed on the heater rieeves with no indications found. The examination methods used were identical to those which detected defects in the Unit 2 pressurizer.
Based on the lack of visual evidence of leakage and on the lack of nondestructive test indications in the twelve sleeves inspected, it is concluded that there is no leakage from the Unit 1 pressurizer penetrations and that it is unlikely that cracks exist in the heater sleeves or instrumentation nozzles.
- 3. Comparison of the Unit I and 2 Pressurizer A review of fabrication records for both pressurizer indicates that the two units are essentially the same. In particular, the following similarities are roted:
B-4 n. I
o L . . The design of the heater sleeves and instrumentation nozzles are identical.
. The same heat of Inconel 600 tubing (with the exception of one L sleeve in Unit 1) was used to fabricate heater sleeves in both units (in confirmation of this, a microstructural examination of a small piece of sleeve removed from Unit I showed an identical microstructure to that seen in Unit 2). The same heat of-Inconel 600 was also used to fabricate instrument nozzles in both units.
With regard to the heater sleeve fabrication / installation, one physical difference identified was in the amount of sleeve reaming performed. Fabrication records indicate that all Unit 2 sleeves were reamed prior to welding in the pressurizer lower head in order to increase the clearance between the sleeve and the installed heater. Additional reaming was performed after welding on some sleeves to provide the required clearance. In Unit 1, reaming was only performed after welding as required to maintain specified sleeve / heater clearances. Metallurgical evaluations of the reamed surface on Unit 2 sleeves indicate increases in surface hardness in the reamed area which could have contributed to the susceptibility tc cracking. With regard to the instrumentation nozzles, the Unit 2 pressurizer upper level nozzle at the 197* location leaked during the shop hydro B-5 u___--' ' . - - _ - - - - . - - - _ .
P i at'500 psi and slag inclusions were found in all Unit 2 upper instrument notzie "J"-groove welds. These upper instrument nozzles were removed and the "J"-groove was remachined. After rework, (including weld repair and machining) the nozzles were welded back into the pressurizer. The original temperature nozzle on Unit I was bent 12' while the pressurizer was being moved for heat treatment. Repair included replacing the bent nozzle with one newly fabricated from the same heat of bar stock.
- 4. Operatina Histories for Units 1 and 2 The Unit 1 pressurizer has operated longer than the Unit 2 pressurizer (92,449 hours versus 86,228 on-line hours) and nominal operating and shutdown conditions (pressure, temperature, water chemistry) are the same for both units. Plant records reveal several periods in both units where chemistry conditions were outside normal tolerance limits, as follows:
i l l B-6
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. A sulfur compound intrusion event-in 1989.in Unit 1 where sulfur y
'(reported as. sulfates) levels exceeded 1500 ppb for a short time. ,
... l c .. ' A sulfur intrusion event in 1983 in Unit 2 where sulfate' levels were reported tg exceed 2000 ppb during a period of two months.
.- .In 1979, an' oxygen intrusion in Unit I resulted in increased reactor coolant suspended solids and decreased hydrogen levels.
.While it is known that oxygen and sulfur compounds can cause intergranularL stress corrosion cracking in sensitized Inconel 600, the metallurgical evaluations indicated that the pressurizer heater sleeves are not in a sensitized condition. Also, SEN/EDS, XPS and AES examinati0n of the fracture surfaces identified that no contaminants were present. Further, the sulfate incident in Unit 2 occurred in 1983 and no leakage had been observed until recently (1989).
Therefore, it is concluded that there is no evidence that the out-of-tolerance water chemistry conditions which occurred contributed to the cracking which occurred in Unit 2. 1
- 5. . Egfety Evaluation for Unit 1 Based on the results of the examinations and evaluations and on the similarities between the Unit I and Unit 2 pressurizer and environmental conditions, the possibility that cracking of the Unit 1 B-7 m w w ..y n w - .,-~ ~ ~.~ n - , . - . . , ~ n ,
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heater sleeves or instrumentation nozzles will occur during future plant operation cannot be dismissed. Therefore, to be conservative, i an evaluation was performed to assess the operability of Unit I with the potedtial for future leakage in the heater sleeves or 1 instrumentation nozzles. The elements of the assessment are discussed , below:
. As a result of the residual stresses in the sleeves / nozzles from i
the welding process, potential cracks in the Unit 1 sleeves / nozzles are expected to be axially oriented and reach a maximum of about 1-1/2 inches in length, as observed in Unit 2.
. A fracture mechanics assessment of the cracks indicates that the cracks are mechanically stable with ample margin under pressure loads. Slow crack growth by stress corrosion is possible, but sudden axial rupture due to plastic tearing cannot occur based on calculation. Therefore, the structural integrity of the pressurizer penetrations against a catastrophic failure is not threatened by the presence of these flaws. Also, the potential for circumferential cracking leading to the complete severance of l
a pressurizer penetration sleeve / nozzle is not considered a credible failure mode for the following reasons.
--First no circumferential cracks have been discovered in Unit 2 heater sleeves.
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--Next, residual stress from reaming, a contributor.to m ]
i the initiation of crhcks in Unit 2, probably ha: l little or no component of-stress in,the longitudinal -
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direction, 'which would be necessary to initiate 3 1 circumferential cracking.- J
--Finally, the longitudinal tensile stress resulting from normal operation is half the hoop stress which ' -
is likely responsible for propagating the' axial cracks.
.. Flaws about 1-inch in through wall length are expected to leak under normal operating conditions at a rate of about I gpm which is easily detectable by the containment leakage monitoring system. This flaw size is within the fracture mechanics stability limit.
Based on this assessment, it is concluded that the. presence of potential axial cracks in the Unit I pressurizer heater sleeves and nozzles is not a safety concern due to a threat to the structural integrity of the pressurizer. Coolant leakage from a typical flaw (1/2-inch through-wall in length) will be at a low rate which would not normally be detectable by the containment leakage monitoring system. Note
~
that in Unit 2 the maximum crack length was found to be i I s B-9
- -- _ _ _ _ ---_--m____m__
ls 1-1/2 ir.ches at the sleeve iriside surface. However, the crack I length will decrease with progression through the sleeve wall. Therefore, an effective, through-wall length of 1/2-inch is judged to be a representative average length for determination of leakage. Based on calculations the expected leak rate from t'he flaw into free space will be only about 0.06 gpm. Actual leak rates into the annulus between the sleeve / nozzle and the bore in the pressurizer are expected to be even lower than 0.06 gpm due to the constrained nature of the annulus and the buildup of corrosion products. A very low leak rate was observed in Unit 2 where boric acid crystal buildup was limited and there was no evidence of steam cutting'in the pressurizer head bore hole surrounding the sleeves. . However, long term operation with undetected leaks is not desirable due to the potential for eventual steam cutting or boric acid corrosion of the pressurizer head (even though no damage was observed at Unit 2). Therefore, the In-service Inspection Program will be modified to require visual inspection of every pressurizer penetration potentially subject to leakage during every refueling outage in addition to all other inspections such as the boric acid corrosior, inspections, Class I system hydrostatic tests and reactor coolant system leakage testing. I B-10 l 1 nu- . i ____ _______ _ _ _ _ __ _ ____ _ _ _J
_- .~ --. - --- i i C. DESCRIPTION OF PRESSURIZER AND PENETRATIONS
- 1. Overall Dascriotion The pressurizer caintains reactor coolant system operating pressure t
and compensates.for variations in coolant volume during load changes. Figure C-1 shows the pressurizer. Pressure is maintained by co'atrolling the temperature of-the saturated liquid volume in the pressurizer, During operation at nominal conditions, approximately y half of the pressurizer volume is occupied by saturated water, and the remainder by saturated steam. Heaters are located in the saturated water half of the pressurizer. Heaters are inserted through penetrations in the lower head. Heat is added to increase the temperature of the water in the bottom half of the pressurizer to increase system pressure. A spray nozzle is located in the upper head of the pressurizer. The spray nozzle is used to quench the steam in the upper half of the pressurizer, thus reducing the pressurizer temperature and saturation pressure. A surge nozzle, located in the lower head of the pressurizer, is connected by a 12-inch pipe to one of the 42-inch pipes which delivers reactor coolant from the reactor to the steam generator. The surge line allows the pressurizer to control reactor coolant system pressure and t compensate for changes in coolant volume. Two 4-inch nozzles are
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located in the upper head of the pressurizer. These are connected to _,, . - y ; ,. . . - , . m_______. . _ _ . _ _ . . _ _ _ _ _ _ _ _ J
t { safety valves which'open when the reactor coolant system is over pressurized and to relief valves which cpen wheit the rate of change of pressure on the reactor coolant system is greater than the capacity of 1
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the pressurizer spray. Two 1 inch pressura tap nozz1es are located in the upper head. Two 1-inch level nozzles are located in both the upper head and the lower' head. In addition, one 1-inch temperature nozzle is located in the cylindrical shell at the elevation of the heaters. There are 120 heater elements inserted into the lower head of the pressurizer. Figure C-2 shows the typical heater arrangement. The heaters are single unit, direct immersion heaters which are -inserted vertically into the pressurizer through sleeves welded in the lower head.
- 2. Penetration and Nozzle Fabrication / Installation History The spray nozzle, surge nozzle and 4-inch safety and relief valve nozzles are of alloy steel construction (SA-503-64, C1. 2) and were stress relieved with the pressurizer vessel. The heater sleeves and the pressure, level and temperature nozzles were installed after stress relief of the vessel. These nozzles are described in more detail below.
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.-The heater p:netrations are 1.158-inch diameter hillside penetrations in the lower head of the pressurizer. The lower head is a I
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48 7/16-inch inside radius hemispherical ~ head fabricated from A-533, Gr. 8, C1.1 steel. A Inconel weld overlay, approximately 3/8-inch thick, was applied to the inside surface of the lower head prior to stress relief of the vessel. The heater sleeves are Inco tel 600 (SB-167-64) tubing. The initial dimensions of'the tubing were 1.25-inch OD and 0.905-inch ID. The outside diameter of the length of the tubing which inserts in the vessel was machined down to 1.156-inch. After stress relief of the vessel, the heater sleeves were inserted into the lower head and an Inconel "J" weld (see Figure C-2) was made between the vessel Inconel weld overlay and the Inconel sleeve. Table C-1 contains the material properties of the heater sleeves. As shown in the table, the actual yield strength of 63.5 ksi is greater than the minimum yield strength of 35.0 ksi for annealed cold drawn l SB-167-64. The greater strength is likely due to the cold working of the tube when it is fabricated by cold drawing followed by a relatively low temperature anneal typical of practice during that period (i.e., 1600*F). l l C-3 l l
i. i i In the fabrication of the Unit I heater penetrations, the ID of the ] Inconel sleeve was specified to be reamed after welding to accept a 0.895-inch rod and to remove any distortion or melt-through in the tube caused by welding. The reaming ID of 0.895-inch was less than the nominal ID of 0.905-inch. Therefore, it is expected that metal removal was minimal as a result of reaming. In the fabrication of the Unit 2 heater penetrations, the ID of the Inconel sleeve was reamed over a 3-1/2-inch length from the top of the sleeve prior to insertion in the vessel for welding. The reaming of the Unit 2 sleeves was to 0.913-inch ID which was more than the original cold drawn nominal ID of the sleeves. Additional reaming was done after welding, as in-Unit 1, as needed to remove distortion / melt-through. The pressure tap and level nozzles are inserted into 1.325-inch diameter hillside penetrations in the upper and lower hemispherical heads. The temperature nozzle is inserted into a 1.325-inch diameter penetration in the cylindrical shell. The nozzles.are fabricated of Inconel 600 (SB-166-64) annealed at 1600*F minimum) with SA-182 F316 stainless steel safe ends. The nozzles have a 1.315-inch OD with l 0.815-inch 10. After the stress relief of the vessel, the nozzles were inserted into the lower and upper heads and an Inconel "J" weld was made between the vessel weld overlay and the Inconel nozzle. Table C-1 contains the material properties of the nozzle materials. C-4
!) ' l The Unit.2' pressurizer upper level nozzle at the 197* location leaked during the shop hydro at 500 psi. An investigation revealed slag inclusions in all' Unit 2 upper instrument nozzle "J"-groove welds. These upper instrument nozzles were removed atid the "J"-groove was remachined. After rework, (including weld repair and machining) the nozzles were welded ba::k into the pressurizer. The welds subsequently were ground and PT examined. The original temperature nozzle on Unit I was bent 12' while the pressurizer was being moved for heat treatment. Repair included replacing the bent nozzle with one newly fabricated from the same heat of bar stock. In summary, fabrication records indicate that of all the 14 nozzles total in both units, only the four upper instrument nozzles in Unit 2 were extensively reworked. C-5
o TABLE C-1 MATERIAL PROPERTIES OF PRESSURIZER HEATER SLFEVES AND PRESSURE TAP, LEVEL AND TEMPERATURE N0ZZLES FOR UNITS 1 AND 2 Yield Strength Tensile Strength % (ksi) (ksi) Elongation Code Code Code-
, Minimum Actual Minimum Actual Minimum Actual Heater Sleeves 35.0 63.5 80.0 103.5 30 45 Pressure Tap, Level '
and Temperature Nozzles 35.0 36.0 80.0 100.0 30 42 l Note, one heater sleeve in Unit I was replaced with a sleeve from a different heat of material. This sleeve's actual yield strength, tensile strength and , percent elongation are 56.0 ksi, 96.0 ksi and 47% respectively. l l i i l-
ilPR ASSOCIATES
'- 4" Spray Nozzle F-90-74-1 ,
S/31/86 Manway 1" Level & Pressure Nozzles c 4" Safety & Relief Valve U' Nozzles i 1" Temperature Nozzle Screen 7
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ide,. N 1" Level Nozzle E
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Support Skirt Heater 12" Surge Nozzle CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 AND 2 PRESSURIZER I FIGURE C-1
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f PRES 8URLZER / / LOWER g f ,, . HEAD TYP Typ. 4 N& dP
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T TYPICAL HEATER ARRANGEMENT FIGURE C-2
l f' 1 l l. D. INSPECTIONS AND EVALUATIONS Visual Inspections for leakaae I 1. On May 5,1989, an in-service inspection (visual), of heater penetrations in the pressurizer in Unit 2 identified boric acid deposits around heater penetrations on the outside surface of the vessel. In addition, boric acid deposits were found at one upper level / pressure tap nozzle. Unit 2 was in a refueling outage at the tinse of the discovery. Unit I was shutdown from 100% power to allow inspection of its pressurizer on May 6,1989. A visual inspection of the Unit 1 pressurizer showed no boric acid deposits or other evidence of leakage at the heater penetration or the level pressure nozzles. A subsequent visual inspection of the Unit 2 pressurizer, performed on July 10, 1989 after all insulation had been removed, classified heater penetrations as leaking, possibly leaking and not leaking, based on the following criteria:
. Leaking - boric acid deposits evident around the penetration and no boric acid " flow" tracks to the penetration from other penetrations.
4 l 1 t
.- Possibly Leaking - boric acid deposits evident around 1
the penetration but boric acid " flow" tracks from i heaters at higher elevations in tha head indicate that the boric acid may be leaking from another penetration (s).
. Not Leaking - no boric acid deposits evident around the penetration.
Twenty penetrations were classified as leaking. Eight penetrations were classified as possibly leaking. Table D-1 identifies the location of those penetrations classified as leaking and as possibly leaking. The visual inspection reports are provided in Appendix 1 of this report. I
- 2. NDE (PT. ET) Inspections- !
The 28 heater sleeves in Unit 2 identified in the visual inspections as leaking or possibly leaking and 12 selected heater sleeves in Unit I were examined using visual (VT), dye penetrant (PT) and eddy current (ET) examinations. For Unit 2 these inspections revealed indications in a total of 18 sleeves and in 14 of the 20 that had been originally identified as leaking. No indications were found in the 12 heater sleeves examined in Unit 1. Figure D-1 shows the heater D-2
,~ l penetration arrangement and labels. Table D-1 identifies those Unit' 2 i sleeves which had PT and ET indications. Based on the NDE results, heater sleeves H-3, C-2, and BB-1 were selected for destructive evaluation. H-3 was a definite leaker but I had no indications discovered in the field examination. H-3 was removed as a core bore sample to preserve the J-groove weld integrity which was considered as a possible source of leakage. BB-1 and C-2 were sleeves with linear indications on the inner surface extending below the weld. These were removed by cutting the sleeve from the ID just below the weld.. Samples H-3 and BB-1 were sent to Combustion Engineering (CE) Laboratory in Windsor, CT, and samp1e C-2 was sent to Westinghouse in Pittsburgh, PA. Results of the CE and Westinghouse tests are discussed further below. Combustion Engineering performed extensive NDE on the H-3 sleeve prior to any destructive analysis. These NDE examinations identified that an ET technique that was slightly modified from the original field examination technique was capable of detecting the defect in the tube. The defect in H-3 was a 3/4-inch long axial crack on the ID of the sleeve that extended through-wall. This modified ET technique was performed in August,1989, on 16 of the 28 heater sleeves originally examined in Unit 2. Indications were detected in 14 sleeves total and in all 11 of the definite leakers which were examined. Table D-1 ider.tifies those penetrations which had ET indications using the improved ET technique. The same ET technique was then used to inspect D-3 a .~ .c -
the 12 selected sleeves in Unit 1. No crack-like indications were detected in the 12 sleeves in Unit 1. A summary of the information obtained from the Unit 2 heater sleeve NDE is as follows:
. Indications found were all axially oriented on the ID of the sleeve less than 1-1/2-inch in length and confined to the top 2 inches of the sleeve, well within the reamed region.
. Indications found occurred above and just below the weld but never across the weld area.
. The heater sleeve J-groove weld and tubing OD above the weld had no indications.
. There were no circumferentially oriented indications.
. Rough machining grooves from reaming were noticeable in approximately the top 3-1/2 inches of the sleeve.
. A dimensional transition from the reaming operation was noted on the ID approximately 3-1/2 inches down from the top of the sleeve.
D-4
e , g f .. Some intrusion of the weld on.the ID surface from melt-through
,m :was noted..
. A summary of th'e information obtained from the Unit I heater sleeve NDE'is as follows:
. No crack like indications were found.
^
. No transitions were found cn the ID of the sleeves, i.e., no evidence of general rearcing as in Unit 2.
. Evidence of localized reaming was found near the top of some sleeves.
. The intrusion of the weld on the ID surface from melt-through was noted.
f PT and ET (original technique) examination of the leaking -level nozzle on Unit 2 revealed three axial cracks extending along the ID of the nozzle from inside the pressurizer. These cracks were located at
.approximately the 4, 5, and 9 o' clock positions and had a maximum length of 3/4 inch which is well within the region of the pressurizer wall. Visual examinations of all the instrument nozzles in Unit 1 pressurizer revealed 'no evidence of leakage. A PT and ET (modified I
technique) examination performed on the two lower level nozzles of
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.. Unit 2 revealed no indications. Examination of the two upper level D-5
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nozzles in Unit I using PT and ET (original technique) also revealed no indications. Therefore, a total of four additional nozzles from l the same heat as the leaking nozzle have been examined and no evidence !
. 1 of cracking has been found. l The NDE results are provided in Appendix 1 to this report.
- 3. Meta 11uraical Evaluations Suspected leaking heater sleeves H-3, C-2 and BB-1 were removed from the Unit 2 pressurizer for destructive evaluation. H-3 was a definite leaker but had no indications discovered in the initial non destructive examinations. H-3 was removed as a core bore sample to preserve the J-groove weld integrity which was considered as a possible source of leakage. BB-1 and C-2 were sleeves with linear indications extending below the weld. These were removed by cutting the tube from the I.D. just below the weld. Samples H-3 and BB-1 were sent to Combustion Engineering (CE) Laboratory in Windsor, CT, and sample C-2 was sent to Westinghouse in Pittsburgh, PA.
In addition to these samples, a small sample of Unit I sleeve material was analyzed by BG&E for comparison with the Unit 2 microstructure. Tests performed at CE and Westinghouse included the following:
. SEM/EDS, XPS and AES analyses on fracture surface D-6
. ' Optical metallography
. Hardness testing of reamed surfaces and unreamed surfaces
. Chemical analysis for material composition
. Modified Huey tests for detecting sensitization.
. Tensile testing for material properties
. Heat treatment studies to determine response of the material to simulated heat treatment Results of the various destructive evaluations were as follows:
. Destructive examination identified cracks initiated on the I.D.
of the sleeves ar.d extended through-wal;. ,
. The J-groove weld was not the source of leakage.
. The pressurizer steel exhibited only minor general corrosion from primary water leakage.
i
. A reamed area was measured to be 0.913 inch diameter for sleeve H-3 and BB-1 and 0.920 inch diameter for sleeve C-2.
D-7
2, ,
- ?
I' ( . ~ The diameter of the unreamed area of the sleeve was measured to be approximately 0.900 inch.
. Meta 11ography revealed the mode of failure was Intergranular Stress Corrosion Cracking (IGSCC).
. Modified Huey Test results indicated that the sleeve material was not sensitized.
. Meta 11ography identified material as susceptible to IGSCC in
. primary water. The Unit I material microstructure looked
- identical with that in Unit 2.
. Meta 11ography revealed'a cold worked layer of material at the I.D. surface of the reamed area.
. SEM/EDS revealed a fracture surface with an intergranular appearance typical to IGSCC.
. SEM/EDS,'XPS and AES identified no contaminants on the fracture surface.
. Chemical analysis and tensile test results agreed with those reported in the material's CMTR.
s D-8
.. m - -
._%___ _ _ _ _ _ . . __.______._____________m_ _ ____________ _ _ _ _ . _ _ _ _ _ . _ __ _ _ _ _ _
o , a I I The findings of the failure analysis indicate.the mode of failure was IGSCC. For IGSCC or any stress corrosion cracking mechanism to occur, three criteria must be satisfied; adequate tensile stress, susceptible material, and appropriate environment. IGSCC can be prevented by elimination of'any one of these three criteria. Coriou reported in 1959 (see H. Coriou, et al, " Stress Corrosion Crecking of Inconei in High Temperature Water," Third Metallurgy b Conference on Corrosion, Saclay, North Holland Publishing Company, Amsterdam, (1959)) that Inconel 600 is susceptible to stress corrosion tracking at tensile stress above the yield strength in high purity water, such as found in the primary water environment of nuclear power plants. Since this discovery, operating plants have experienced cracking of Inconel 600 in areas of high stress such as the rolled area of steam generator tubes, steam generator tube bends, steam generator tube plugs, and pressurizer heater sheaths. Since no contaminant is required, this form of IGSCC has been named Pure or Primary Water Stress Corrosion Cracking (PWSCC). - Plant failure experience and laboratory experiments have indicated the susceptibility of Inconel 600 to PWSCC is strongly dependent on the microstructure. The least susceptible microstructure is one where the material is thermally treated to provide a continuous distribution of i i carbides at the grain boundaries (see G. P. Airey, " Optimization of Metallurgical Variables to improve Corrosion Resistance on Inconel Alloy 600," EPRI NP-3051, July,1983). The heat of material in the D-9
i Unit I and-2 sleeves was not ' optimized having only a semi-continuous
. distribution of carbides at the grain boundaries. Near the I.D. the carbides were found in intragranular bands and the surrounding grain boundaries had very little carbides. These characteristics indicate the Unit I and 2. material is susceptible to PWSCC.
The nieta11urgical evaluation results are included as Appendix 1 to thte report.
- 4. Reactor Coolant System Water Chemistry Evaluations Plant Chemistry Procedure CP 204 (Specifications and Surveillance of the Reactor Coolant System) provides the chemistry. specifications and surveillance intervals for the reactor coolant system water for the various plant operation modes. In addition, CP 204 identifies out-of-
~11mit conditions and specifies actions to be taken to respond to out-of-limit reactor coolant system chemistry conditions. Note that the chemistry specifications and surveillance intervals are also identified in the piant Technical Specifications.
Over the course of plant operation, events have occurred occasionally such that the reactor coolant system water chemistry falls outside of the specified limits. Specific plant events which resulted in out-of- f tolerance chemistry condition in the reactor coolant system are discussed in the following: i D-10
b
- Unit 1 Calvert Cliffs Event Report 89-05 describes an event which occurred during March 1989 which resulted in. sulfate levels as high as 1866 parts per billion (ppb). Sulfate concentrations exceeded normal levels during a period of about one week. The cause of this event was resin fines and/or organic sulfates entering the reactor coolant system as a result of the mechanical or chemical breakdown of the 12 CVCS ion exchanger.
In 1979, an oxygen intrusion in Unit I resulted in reactor coolant system suspended solids and decreased hydrogen levels. This intrusion was due to injections of instrument air into purification ion exchangers. Unit 2 Calvert Cliffs Event Report 83-05 describes an event which occurred during January 1983 which resulted in high sulfate levsis. The cause of this event was resin entering the reactor coolant system from the 21 CVCS ion exchanger as a result of a failed retention element and a torn basket strainer. As a result, the sulfate levels in the reactor coolant system were calculated from conductivity measurements to be greater than 2000 ppb during a two-month period with a peak sulfate concentration of about 2800 ppb. D-11
It should.be noted that incidents of sulfur or resin intrusion into the reactor coolant system are not unique to Calvert Cliffs and have occurred in other PWR plants. Also, the metallurgical evaluations for the heater sleeve material indicated that the sleeve material was not ; in a sensitized condition. Therefore, the material is not particularly susceptible to cracking as a result of high sulfur or oxygen levels in the reactor coolant system.
- 5. Fracture Mechanics Evaluation An analysis was performed to evaluate the potential for unstable rupture of the pressurizer sleeves containing axial flaws. This section summarizes the fracture mechanics analysis performed which shows that unstable crack growth is not expected. The conclusions of the analysis summarized here also apply to postulated axial flaws in the pressurizer instrumentation penetrations since the ratio of radius to wall thickness for these penetrations is virtually equal to that of the heater sleeves.
The determination of whether cracks will grow is based on the comparison of the crack driving. potential for a particular flaw size, component geometry and loading, to J ic the critical value of J at which cracks will begin to grow. If the calculated J is less than the J ie no crack growth is expected. If the calculated J is greater than Jjc, crack growth is expected and a tearing stability analysis is D-12
N required to determine whether the crack will grow'in a stable or unstable manner. 1 At Dw stresses or in brittle materials the value of J is related to the linear-elastic fracture mechanics stress intensity factor (K) by the relation: 2 K J =
.E In ductile materials, such as Alloy 600, the validity of the relationship shown above can be extended to the elastic-plastic regime through the use of :n effective crack length which accounts for the plastic zone which develops at the crack tip in ductile materials.
Reference 5.1 provides an expression for K for a cylindrical vessel containing a through-wall axial crack which incorporates the plastic zone correction. Using this expression and the relationship between J and K, J can be calculated as follows: aa,2 x(a/a,)2 E ,1 - (Y 2/S)(a/a,) , where: a, = material flow stress 2a = crack length E = Young's modulus a = applied stress s D-13
f Y - Geometric correction factor for axial flaws in cylindrical vessel (Reference 5.1)
# - constant, conservatively assumed equal to 2 (plane e stress conditions) for this analysis In this analysis, the applied stress is assumed to result exclusively from pressure (P - 2250 psi) since residual stresses are assumed to be relieved at the onset of through-wall cracking.
Using the equation for J shown above, a conservative estimate of the crack driving potential, for a one-inch flaw, is calculated to be L 30 lb/in (Reference 5.2). For a two-inch flaw, the value of J is calculated to be 218 lb/in. Recent tests performed at Materials , Engineering Associates (Reference 5.3) conclude that J 3e for Alloy 600 in the temperature range from 75'F to 650'F exceeds 5000-lb/in. Since this J 3e value is far greater than the applied crack growth potential for the case of postulated cracks in the Unit 1 pressurizer sleeve, no crack growth is expected due to purely mechanical means and no tearing stability analysis is required. However, continued stable crack growth may occur as a result of stress corrosion cracking. References 5.1 Paris, P. C. and Johnson, R. E., "A Method of Application of Elastic-Plastic Fracture Mechanics to Nuclear Vessel Analysis," Elastic-Plastic Fracture: Second Symposium, Volume II -- Fracture Resistance Curves and Engineering Applications. ASTM STP 803, C. D-14 _ _ _ _ _ _ _ _ _ _ - . _ _ _ .m___mm._-._m.-.m____ ._______-.-______-mm__--
i-F. Shih and J. P. Gudas, Eds., American Society for Testing and Materials, 19.83, pp. 11-5-11-40. 5.2' MPR Calculation 90-74-TSL-1 " Pressurizer Sleeve Crack Growth" Calculated by T. S. Lubnow, August 31, 1989 5.3 Personal Conversation with Al Hiser, Materials Engineering Associates, results reported to be published in an upcoming NUREG.
- 6. Vooer-Bound leak Rate Evaluation The correlation between sleeve through-wall crack length and leak rate was calculated using CIRFLO, a specialized computer code developed for this purpose (Reference 6.1). The computer model assumes that the pressure loss through the crack can be described by a typical fL/D loss mechanism. Choking (critical flow) is evaluated using a homogeneous choking model which depends on local st'agnation pressure and stagnation enthalpy at the choke point. Upper bound estimates of flow through tight cracks were obtained by using a friction factor based on a relative roughness of 0.001. The crack opening flow area as a function of internal pressure was determined from formulae given i l
in Reference 6.2. Additional conservatism is included by substituting the sleeve outside diameter in the formulae for the crack opening area which were developed for thin-walled cylinders. D-15 i __._______m._______.__ _ _ _ _ . _
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The. relationship between through-wall crack length and leakage is calculated in Reference 6.3 and shown in Table' D-2. As shown in , i Table D-2 the calculated upper bound leak rate 'for through-wall axial flaws of length typical of those identified in Calvert Cliffs Unit 2 1- pressurizer sleeves (1/2 inch) is small. Note that in Unit 2 the maximum crack length was found to be 1-1/2 inches at the sleeve inside surface. However, the crack. length will decrease with progression through'the sleeve wall. Therefore, an effective, through-wall length-of-1/2-inch is judged to be a representative average length for determination of leakage. The calculated leakage is consistent with the observation of no steam cutting of the pressurizer shell and would not be expected to be detectable by conventional leak detection systems. Leakage is'also not' expected to be sufficient to wet the hot pressurizer.shell for a significant time period and thus cause boric acid corrosion. References 6.1 MPR computer Code, "CIRFLO", July,1986 6.2 NUREG/CR-3464 "The Application of Fracture Proof Design Methods Using Tearing Instability Theory to Nuclear Piping Postulating Circumferential Through-Wall Cracks", P. C. Paris and H. Tada, September, 1983', p.79 6.3 MPR Calculation 90-74-TSL-2 " Pressurizer Sleeve Leak Rate", Calculated by T.S. Lubnow, August 31, 1989 i. i D-16 gww,., < ~ . . . - . - . - . ; i
L l TABLE D-2 UfflR-BOUND PRESSURIZER HEATER SLEEVE LEAKAGE i J i Upper Bound I Crack Length Leak Rate (inches) (gpm) 0.25 0.01 0.50 0.06 0.75 0.25 1.00 0.69 1.25 1.52 1.50 2.90 1.75 5.05 2.00 8.19 m.j,3 . , i _ m. . _ . _ ..___..__.__._.___._____m___ . _ - . . - _________m_ _ . _ _ _ __m
TABLE D-1 metsirs tntTT 2 PRREstNTM WEATER _StIEVES smemer or vor ustus original Improved Prob. Eddy Eddy Prob. Not Currens FT Current Leaking Tmaking Mn5 Results Results Results Comments Raater
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- 18 0 SECTION A-A PRESSURIZER I
i PRESSURIZER HEATER PENETRATIONS ' v,..._..... ' ~ ' ' '
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J I. Materials Engineering and Analysis Unit, BG & E, Materials Testing and Evaluation Report, Job No 89-30-223. e i 4
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I l MATERIALS ENGINEERING AND ANALYSIS UNIT 3 MATERIALS TESTING AND EVALUATION ( l REPORT
, Evaluation of Pressurizer l
- Penetration Leakage DATE: /,usust r, 1989 JOB #: 89-30-223 l
i SALTIMORE GAS AND l ELECTRIC l _-m--m._-- _ _ _ _ _ - _ _ _._
MATERIALS ENGINEERING AND ANALYSIS UNIT Materials Tesing and Evaluation Report To: T. M. Khan From: D. A. Wright
Subject:
Evaluation of Pressurizer Penetration Leakace Date: August 30, 1989 Prepared by: . . ,ha, D. A. Wright Sr. Materials Engineer Reviewed by: 83 2) 2n O/V R . O . Hgrdies Materials Engineer Reviewed by: - - A. S. Reed Principal Materials Examiner l Approved by: <- f4 / R. B. Pond, Jr. Principal Metallurgist Job No.: 89-30-223 DAW /ROH/ deb l l I of III
l f CONTENTS l
SUMMARY
INTRODUCTION NON-DESTRUCTIVE EXAMINATIONS Heater Sleeves Instrument Nozzles FABRICATION RECORDS Heater Sleeves Instrument Nozzles UNIT 2 PRESSURIZER PENETRATION FAILURE ANALYSIS Heater Sleeves Instrument Nozzles UNIT 1 PRESSURIZER EVALUATION Heater Sleeves Instrument Nozzles LEAK ANALYSIS REFERENCES II of III
e j i LIST OF. FIGURES AND ATTACllMENTS ' 1 h'
.1 Figure 1 Overall Schematic of Pressurizer Penetrations
' Figure 2 Details of Heater Sleeve Penetration Figure 3 Details of Instrument Nozzle Penetration Attachment 1 Heater Sleeve Certified Material Test Report Attachment 2 Instrument Nozzle Certified Material Test Report Attachment 3 NDE Report of Pressurizer Penetrations m ef m L
- i I
h
SUMMARY
We have reviewed the examinations and investigations performed on the pressurizer penetrations for CCNPP Unit 1 and Unit 2 and conclude that all evidence supports the continued operation of Unit 1. NDE inspections of a 10% sampling of sleeves on Unit 1 identified no indications and there is no evidence of leakage on any Unit 1 sleeves. The failure of Unit 2 heater sleeves was caused by Primary Water Stress Corrosion Cracking (PWSCC). The heat of material (common to both units) is susceptible to PWSCC at high tensile stress. High tesidual tensile stress, present on the ID surface of Unit 2 sleeves from a reaming operation, contributed to initiation of the cracks. Records indicate Unit 1 sleeves were reamed, after welding into the pressurizer shell, to permit passage of a 0.895 inch diameter rod which was 0.005 inch less than the measured diameter of the unreamed sleeves. Therefore, reaming of Unit I sleeves would not have required removal of a significant amount of material. Unit 2 sleeves were reamed before installation and welding into the vessel to a 0.913 inch nominal diameter which is 0.013 inch more than the measured diameter of the unreemed portion of the sleeves. The resulting residual stress from reaming Unit 1 sleeves is low in comparison to the stress in Unit 2 sleeves where about 0.013 inch was removed from the sleeve ID. The light reaming operation and absence of cracks indicate that Unit 1 . heater sleeves are less susceptible to PWSCC. NDE inspections of two upper level nozzles in Unit I revealed no indications and there is no evidence of leakage on any of the Unit 1 nozzles. The same heat of material was used for pressurizer instru-ment nozzles in both Units. The failure mode of the upper level i nozzle in Unit 2 was probably PWSCC. Records indicate Unit 2 upper nozzles were extensively reworked. It is possible the rework of Unit 2 nozzles may have increased susce pti'oility to PWSCC by creating microstructural changes and/or higher residual stress. 1 Page 1 of 14
.The possibility of cracking of Unit 1 pressurizer penetrations (sleeves & nozzles) can not be completely discounted. If the Unit 2 mechanism of cracking should occur in Unit 1~the cracks would leak at a lim *ted rate as. demonstrated by the extensive cracking in Unit 2 vith the attendant minor amount of leakage. All Unit 2. cracks were axial and contained in the pressurizer steel with a thin annulus between each sleeve / nozzle and the pressurizer wall. The pressurizer steel would prevent axial rupture of the sleeve / nozzle and limit leakage. To avoid the posibility of significant boric acid corrosion or steam cutting of the pressurizer steel, the penetrations on Unit 1 should be inspected during scheduled maintenance 'and refueling outages.
No circumferential cracks have been discovered in Unit 2 and the stress for initiation and driving cracks in this direction are rela-tively low. We conclude catastrophic failure of these penetrations is not possible by this damage mode. i Page 2 of 14
INTRODUCTION On May 5, 1989 an inservice inspection of the Unit 2 pressurizer identified leaks at numerous heater sleeve penetrations. A later inspection identified an instrument nozzle also leaking. Evidence of possible leakage was present around 28 heater sleeves and one upper level instrument nozzle where they penetrated the pressurizer. There -were 20 of the 28 heater sleeves with isolated boric acid rings with no evidence of leakage from adj acent heaters. These 20 sleeves were considered to be definitely leaking. The small quantity of boric acid crystal build-up indicated the total leak volume was small during operation. The only credible leakage paths for these penetrations were either the sleeves / nozzles adj acent the pressure boundary weld inside the pressurizer wall or the pressure boundary (J-groove) weld just inside the pressurizer. There are a total of 120 heater sleeve penetrations in the pressurizer (Figure 1). The details of the heater sleeve penetration are shown in Figure 2. The heater sleeves are SB 167 Alloy 600, heat No. NX8878 manufactured by INCO (see CMTR Attachment 1). An annealing temperature was not reported for this material but it was typical for INCO to mill annealed Inconel 600 at 1600*F minimum. Both the Unit 1 and the Unit 2 sleeves are from the same heat of material. There are a total of seven instrument nozzles in the pressurizer (Figure 1). The details of a typical nozzle penetration are shown in Figure 3. The nozzles are SB-166 Alloy 600, heat No. NX8297 manufac-tured by INCO (see CMTR Attachment 2). An annealing temperature of 1600 F minimum was reported on the CMTR. Both Unit I and Unit 2 pressurizer instrument nozzles are the same heat of material. Due to the unknown nature of the problem on Unit 2, Unit 1 was shut down to determine whether leaking was a generic problem that would affect safe operation of the plant. Page 3 of 14
l NON-DESTRUCTIVE EXAMINATIONS Heater Sleeves k'e originally examined the 28 heater sleeves in Unit 2 and 12 ! selected heater sleeves in Unit 1 using visual (VT), dye penetrant (PT) and eddy current (ET) examinations (see NDE report, Attachment 3). For Unit 2 these inspections revealed indications in 18 sleeves total and in 14 of the 20 that had been originally identified as definite leakers. No indications were found in 12 heater sleeves examined in Unit 1. Although originally indications were not detected in all the leaking sleeves the results of the NDE provided useful information. Information obtained from Unit 2 NDE: e Indications were all axially oriented on the ID of the sleeves, less than 1 1/2 inches in length, and confined to the top 2 inches of the sleeve. e Indications occurred above and below the weld but never across the weld area. e The J-groove weld and sleeve OD above the veld had no indications. Therefore no ID indications above the wc1d were observed to go through-wall. e There were no circumferential1y oriented indications. e Rough machining grooves from reaming were noticeable in approximately the top 3 1/2 inches of all the sleeves.
- A dimensional transition (step) from the reaming operation was noted on the ID of all sleeves approximately 3 1/2 inches down from the top of the sleeves.
- Some intrusion of the weld on the ID surface from the melt-through was noted.
Page 4 of 14
I 1 Information obtained from Unit 1 NDE: e No indications were found. e No dimensional transitions (step) indicative of heavy reaming were found on the ID of the sleeves.
- In general, no rough machining grooves from reaming were noticeable on the ID of the sleeves.
e Evidence of localized reaming was found near the top of some sleeves.
- Some intrusion of the veld on the ID surface from melt through was noted.
Heater sleeves H-3, C-2, and BB-1 were selected from Unit 2 for failure analysis. H-3 definitely had leaked but there were no reproducible indications reported in the original field examinations. Sleeve H-3 was removed as a core bore sample to preserve the J-groove weld, which was considered as a possible source of leakage. Sleeves BB-1 and C-2 had linear indications extending below the weld. Samples H-3 and BB-1 were sent to Combustion Engineering (CE) in Windsor, CT, and sample C-2 was sent to Westinghouse in Pittsburgh, PA. Combustion Engineering performed extensive NDE on the H-3 sleeve and J-groove veld prior to any destructive analysis. These NDE examinations identified a slightly modified ET technique that was capable of detecting the defects in the sleeve. This ET technique was performed in the field on 16 of the originally examined sleeves in Unit 2. There were 11 of these 16 sleeves that were identified as definite leakers. 2ndications were detected in 14 sleeves total and in all 11 of the definite leakers. The same ET technique, demonstrated to have a high confidence of detection in Unit 2, was used to inspect the 12 sleeves in Unit 1. No crack-line indications were detected in the 12 sleeves in Unit 1. Page 5 of 14
Instrument Norzles A PT &nd ET (the original technique) examination of.the leaking level nozzle on Unit 2 revealed three axial cracks extending along the ID of the nozzle from inside the pressurizer. These axial cracks were located at approximately the 4, 5, and 9 o' clock positions and had a maximum length of 3/4 inches which is well within the pressurizer wall, A Visual examination of all the instrument nozzles in Unit 1 pressurizer revealed no evidence of leakage. PT and ET (the modified technique) examinations performed on the two lower level nozzles of Unit 2 revealed no indications. Examination of the two upper level nozzles in Unit I using PT and ET (the original technique) also revealed no indications. A total of four additional nozzles from the same heat as the leaking nozzle have been examined with no evidence of cracking. l i Page 6 of 14
P I . FABRICATION RECORDS Heater Sleeves
'A review of the fabrication records for Unit 1 and Unit 2 provides important information on the reaming operation for both Units. Heat treatment was not performed either on or in the immediate vicinity of the heater sleeves or J-groove welds. It is likely welding resulted in slight distortion and/or veld intrusion that could have interfered with installation of the heaters. The drawings specified that after welding the heater sleeves were to be reamed where necessary.
Records indicate that after welding all Unit I heater sleeves were reamed to permit passage of a 0.895 inch rod. The original ID of the sleeves was specified to be 0.905 inch 1 0.075 inch. Unreamed sleeves from the same heat had a measured ID of 0.900 inch. There-fore, the reaming in Unit I would not have required removal of a significant amount of material from an unwelded sleeve.
' Records indicate that all heater sleeves in Unit 2 were reamed 3 1/2 inches from the top prior to welding. The reamed diameter was 0.913 inch, except for 7 sleeves which were inadvertently overreamed to diameters ranging from 0.918 to 0.928 inch. These diameters were in good agreement with measurements in the reamed areas of heater sleeves removed for failure analysis. Records indicate 118 heater sleeves in Unit 2 were also reamed or polished after welding.
Instrument Nozzles The Unit 2 pressurizer upper level nozzle at the 197 degree location leaked during shop hydro at 500 psi. An investigation revealed slag inclusions in all Unit 2 upper instrement nozzle J groove welds. These upper instrument nozzles were removed and the Page 7 of 14
p ( s [b ' J-groove was remachined. After rework, (including weld repair and machining) the nozzles were we1Jed back into the pressurizer. The welds. subsequently were ground and PT examined. h e original temperature nozzle on Unit 1 was bent 12 while the l pressurizer was being ' moved for heat treatment. Repair included replacing the bent nozzle with one newly fabricated from the se.me heat of bar stock. The nozzle material currently installed has not been reworked. In summary, fabrication records indicate that of all the fourteen nozzles total in both units, only the four upper instrument nozzles in Unit 2 were extensively reworked. Page 8 of 14
UNIT 2 PRESSURIZER PENETRATION FAILURE ANALYSIS Heater Sleeves The failure analyses by Combustion Engineering and k' westinghouse have identified the following: e Destructive examination identified axial cracks that initiated on the ID of the sleeves and extended through-wall. e Thc J-groove weld was not the source of leakage. e The pressurizer steel exhibited only minor general corrosion from primary water leakage. e The reamed area measured 0.913 inch diameter for sleeve H-3 and BB-1, and 0.920 inch diameter for sleeve C-2. e The diameter of the unreamed area of the sleeves measured approximately 0.900 inch, e Meta 11ography identified the mode of failure as Intergranu-lar Stress Corrosion Crscking (IGSCC). 2 e Modified Huey Test results (20-186 mg/dm / day ) indicated that the sleeve material was not sensitized. e Meta 11ography identified the sleeve material as susceptible to ICSCC in primary water. e Meta 11ography and microhardness revealed a heavily cold worked layer of material at the ID surface of the reamed area. e SEM/EDS revealed a fracture surface with an intergranular appearance typical of IGSCC. e SEM/EDS, XPS and AES identified no contaminants on the fracture surface, e Chemical analysis and tensile test results agreed with those reported in the material's CMTR. Page 9 of 14
I The findings of the failure analysis indicate that the niode of failure was- IGSCC. For IGSCC or any stress corrosion cracking mechanism to occur three criteria must be satisfied; adequate tensile stress, susceptible material, and appropriate environment. IGSCC can be prevented by eliminating any one of these three criteria.
.Coriou reported in 1959 that Inconel 600 is susceptible to stress corrosion cracking at tensile stress above the yield strength in high purity water, such as found in the primary water environment of nuclear power plants. Since this discovery, operating plants have experienced cracking of Inconel 600 in areas of high stress such as the rolled transition area of steam generator tubes, steam generator short' radius tube bends, steam generator tube plugs., and pressurizer heater sheaths. Since no contaminant is required, this form of ICSCC has been named Pure or Primary Water Stress Corrosion Cracking (PWSCC).
Plant failure experience and laboratory experiments have indicated that the susceptibility of Inconel 600 to PWSCC is strongly dependent on the microstructure . The least susceptible material is one with a low yield strength ard thermally treated to provide a continuous distribution of carbides precipitated at the grain boundaries. The pressurizer sleeve material, Heat No. NX8878, was not optimum having a high yield strength and only a semi-continuous distribution of carbides at the grain boundaries (which is typfcal of mill annecled Inconel 600). Near the ID the carbides were found in intragranular bands and the surrounding grain boundaries had very few carbides. These characteristics indicate this heat of material is susceptible to PWSCC. Tensile stress of approximately 10,000 psi from normal operation appears too low to initiate PWSCC. Historically PWSCC has been observed in locations of high plastic strain with attendant high residual tensile stress. Evidence of a heavily cold worked layer at the ID surface from reamini; and axial cracking abova the weld where no operating stress was present suggests high residual tensile stress was Page 10 of 14
present at the'ID. We conclude that high residual tensile stress at
' the ID surface from reaming (possibly combined with manufacturing-fabrication residual stress) was responsible for initiation of the cracks and normal operating stresses were responsible for the through-wall propagation of cracks which initiated below the weld.
Instrument Nozzles The faxiure of instrument nozzles in the vapor space of pressurizer is not an unprecedented event. SONGS 3 experienced failure / leakage of an upper nozzle in February of 1986 . A latter inspectfon identified a crack in another upper nozzle from the same heat of material, The cracking described in the SONGS nozzles was very similar to Calvert Cliffs Unit 2 upper level nozzle cracking. The failure mode was identified as PWSCC caused by a material having high yield strength (60 ksi) and poor microstructure combined with residual stress at a high temperature. Based on the low reported yield strength (36 Ksi) for the Calvert Cliff's nozzle material, hi 6h e- eptibility to PWSCC would not be expected. The welding, removal, remachining, weld repair and replacement of the Unit 2 upper level nozzles has probably caused local microstructural changes and/or re gions of high residual stress which would increase the susceptibility to PWSCC. Page 11 of 14
1 UNIT 1 PRESSk TZER-EVALUATION Henter Sleeves Hea ter sleeves in Unit 1 are from the same material heat and exposed to the same environment as those in Unit 2. Unit 1 has more operating hours with no evidence of cracking. The major difference between units was the reaming operation. Reaming in Unit 1 was more shallow and localized than in Unit 2 resulting in lower residual stress at the ID. Tha absence of the heavy reaming performed on Unit 2 and the longer operational period with no evidence of cracking indicate that Unit 1 heater sleeves are less susceptible to PWSCC. However, the possibility of cracking of Unit 1 sleeves in the future can not be completely discounted at this time. Instrument Nozzles Instrument nozzles in Unit 1 are from the same heat of material and exposed to the same environment as those in Unit 2. Unit I nozzles have more operating hours with no evidence of cracking. Based on the low yield strength for the nozzle material, high susceptibility to PWSCC would not be expected. The n.ajor difference between units appears to be the extensive amount of rework requried for the upper instrument nozzles in Unit 2. It's possible the rework of Unit 2 upper instrument nozzles may have increased susceptibility to PWSCC by creating microstructural changes and/or higher residual stress. However, the possibility of cracking of Unit 1 nozzles cannot be completely discounted at this time. Page 12 of 14
i l l LEAK ANALYSIS Extensive cracking. was discovered in Unit 2 with only minor amounts of leakage occurring during operation. FWSCC cracks provide a very narrow leakage path. In the heater sleeve the crack exists along a decreasing temperature gradient. This will provide an exponential decay in the cracking kinetics and eventually the arrest of PWSCC. In the crack regions the heater sleeves are surrounded by a jacket of pressurizer steel which would prevent a severe axial rupture I (fishmouth) and limit the amount of leakage. An annulus of less than l 0.0035 inch by 4.00 inch in lergth exists between the pressurizer steel and the heater sleeve. For Unit 2, leaks in the sleeve resulted l in minor corrosion of the pressurizer steel and a build up of black magnetite corrosion product which further c.onstricts, the leakag,e path. All evidence suggests significant leakoge cannot occur in Unit 1 heater sleeves from PWSCC. To avoid the possibility of significant boric acid corrosion of steam cutting or the pressurizer steel from leakage, the penetrations on Unit 1 should be inspected during scheduled maintenance and refueling outages. The only remaining question is whether catastrophic failure can occur from circumferential cracking of the heater sleeve. No circumferential cracks have been discosered in Unit 2 heater sleeves. Residual stress from the reaming, a contributor to the initiation of cracks in Unit 2, probably has little or no component of stress in the longitudinal direction, wnich would be necessary to initiate circumferential cracking. Tensile stress from normal operation in the longitudinal direction is im1f the hoop stress which is believed to be responsible for propagating the axial cracks. We conclude that catastrophic failure of heater sleeves is not possible by this mode of damage. Page 13 of 74
l REFERENCES
- 1. H. Coriou, L. Grall, Y. LeGall, and S. Vetter. " Stress Corrosion Cracking of Inconel in High Temperature Water", 3e Colloque de Metallurgic Corrosion (Seche et Aquese), Centre d' Etudes Nucleaires de Saclay, June 29 - July 1, 1959 North Holland Publishing Co., Amsterdam,.p. 161.
- 2. C. P. Airey, " Optimization of Metallurgical Variables to Improve Corrosion Resistance on Inconel Alloy 600," Palo Alto, CA: Electric Power Research Institute, EPRI NP 3051, July 1983,
- 3. C. Chiu, Grosselin, S., " Interim Failure Analysis for San Onofre Unit 3 Pressurizer Instrument Nozzle", 1987.
Page 14 of 14
4" S PRAY N0ZZE MAY LIFTING LUG " 1" LEVEL N0ZZLE 4" SAFETY & RELIEF N0ZZE Mj '
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s ATTACHMENT 2 INSTRUMENT NOZZLE CERTIFIED MATERIAL TEST REPORT
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L ATTACHMENT 3 NDE REPORT.OF PRESSURIZER PENETRATIONS )
~ - - - - - - - - - - . - . _ - . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
,l.'
t !' , TABLE OF CONTENTS Introduction i
'QC Call.Nos;.
.. . l l- Unit i VT/PT-
'! Unit:2 VT/PT:
L Uni t 1 ET ZETEC
. Unit:2 ET ZETEC r l
' Unit 1.ET AMDATA
- Unit 2 ET AMDATA j Unit 2 UT AMDATA' Unit: 1. Removed Htrs. PT Exam ~j Unit 2 Removed'Hers. PT Exam )
3 Unit 1. Level Nozzles' j i Unit 2 Level-Nozzles ) l i l 1 l
.J j
j l 1 l j I l l 1
c_. . _ . . ,__-__ _ _ . _ _ _ . . i l 1 INTRODUCTION f ) i l l l l l
_, 1 CAL \ LEET CLIFF 5 PEESSUEiEEE 80 \ t OM HEAD l PEMETTPlTIOMS 4 180* I
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[ f..' , CALVERT CLIFFS NUCLEAR POWER' PIANT
,1 UNIT NO. 1 PRESSURIZER EXAMINATIONS
'o.
'- 12 sleeves and "j" welds were non-destructively examined by the following rethods:
- 1). . visual 2)" liquid penetrant 3)'. eddy current
. o' The following sleeves and "j" welds were examined.
Al B2 C3 B1- C2 D3 D1. D2 B4
- A2: B3 D4
- Two upper ' instrument nozzles were examined non-destructively. The results of the
- closva and nozzle examinations are as follows:
o No indication detected in sleeves by visual, liquid penetrant or modified eddy current techniques. o No indications detected in upper instrument nozzles by visual, liquid penetrant or original eddy current. 4 4 L
i 4 CALVERT CLIFFS NUCLEAR POWER P1 ANT
. UNIT 2 PRESSURIZER EXAMS VISUAL EXAMINATIONS V
.. Visually examined lower head of No. 21 Pressurizer NDE Report No. ISI 89-866-
! frtn under pressurizer support skirt. Each heater penetration was noted ~ to 'be in ,
)
ens of three categories:
- 1. leaking
- 2. possibly leaking ,
- 3. not leaking If boron was evident around the penetration and no tracks of boron from other croca cxisted, the penetration was noted as leaking.
If boron was evident around penetration but tracking from higher areas existed tha penetration was noted as possibly leaking. ; If no boron was evident the penetration was noted as not leaking. One penetration HH4 did not have any boron or tracking but was noted as psseibly leaking because of discoloration of- the carbon steel around the p2nstration. Fo11cwing sleeves identified as leaking: .j i ; I Z1 El Al H1-BB1 G1 D2 E2 . Q2 K1 D2 E2 J2 F1 AA2 F3 G2 D1 C2 H3 l L Following sleeves identified as possibly leaking: Q1 S2 ) J1 N2 : B1 G1 B2 HH4 l Following riceves identified as not leaking: IG1 GG1 EE2 K2 GG3 Y4 EE3 X4 ) FF1 DD1 X2 CC2 BB3 T4 X3 EE4 l FF2 Y1 R2 U2 Z3 Q4 R3 AA4 l HH2 T1 L2 H2 W3 P4 L3 S4 ; GG2 P1 L1 N1 V2 M2 J3 K4 l I SB2 M1 R1 U1 W4 P3 G3 F4 Z2 P2 X1 CC1 24 Q3 G4 D4 V2 T2 EE1 FF4 BB4 T3 J4 B4 i V1 Y2 AA1 FF3 GG4 V3 L4 A2 W1 DD2 S1 HH3 DD4 DD3 R4 B3 K3 S3 AA3 CC3 U3 N3 C3 C4 H4 N4 U4 CC4
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UNIT NO. 2 PRESSURI71R EXAMINATIONS-O' .r p i o- (Twenty eight - (28) sleeves . and ."j " welds were non-destructively examined by the ' following methods: -l [
- 1) visual 2)~ liquid penetrant 3)' eddy current o - The_ following. sleeves and "j" welds were examined.
Al El C2- N2. B1 J1 D2 ?AA2
'C1 K1 E2 S2 Di~ Q1 . F2 ' D3
.El Z1 G2 F3 F1 - BB1 'J2 H3 C1- B2 Q2 HH4
'Riguita:
Liquid penetrant' examination revealed- rejectable indications in the following-c1Scvas: A1,.B1', C1, D1', E1, F1, G1, K1',.Q1, Z1., BB1 B2, C2, D2, F2
. Original - (Zetec) eddy current examination detected rejectable indications in clocva numbers.
K1, Q1, BB1, E2, J2, Q2 Modified (AMDATA) addy current detected rejectable indications in the following 01:cv:3.
'D3',-F3, El, G2, AA2, H3, C1, F1, D1, J1, Q1, Z1, B1, D2, J2, Q2, N2 l'Thr AMDATA system was not used to examine the original 28 sleeves only 16 of the
- criginal were examined. Sleeve H3 was examined at CE's Winsor Ct.
5 1 1 CALVERT CLIFFS UNIT 2 PRESSURIZER HEATER SLEEVES
SUMMARY
OF NDE RESULTS Original Improved Prob. Eddy Eddy Prob. Not Current PT Current - Hsater # Laaking Leaking 14aking Results Results Results Comments 21 X X X BB1 X X X No Exam FA 01 X X X X _ O2 X X X J2 X- X X C2 X X El 'X X No Exam C1 X X No Exae J1 X NIN K1 X X X No Exam F1 X X X D1 'X X X B1 X X X A1 X X No Exam , B2 X X No Exam-D2 X X X F2 X ,X No Exam S2 X No Exam AA2 X X N2 X NIN C2 X X No Exam FA C1 X X X M1 X X HH4 X No Exam E2 X X No Exam D3 X X F3 X X H3 X. X FA NIN - No Indications Noted FA- - Removed for Failure Analysis I
.., n-,._ _ _ _ - .. - - _ - OC CALL NOS.
y; i , 1,, t, y NONDESTRUCTIVE EXAMINATION PERSONNEL CALVERT CLIFFS PRESSURIZER HEATER PENETRATION EXAMINATIONS 3 [ Examiner Comnany 'Imvel'PT Level VT Scott Erickson. VCR Corp. 11J II
-R b rt Kemp. BG&E II- II
' Donald Robinson-- BG&E- .II II
;.R::b2rt Ryan. BG&E II II Barn:rd Wigginton BG&E II II Level ET
, Lewis J. Lucier Zetec- IIA Unit No. 1 Karl R.-Seeger Zetec IIA Unit No. 2 All Data Reviewed by ME&AU Engineering Level ET Level PT Level VT
. Robart B. Pond, Jr. BG&E III Sr.nford R. Buxbaum BG&E II III III Alvin S. Reed BG&E III III III
[ CALVERT CLIFFS UNIT NO. 1 QC-CALL NOS. PRESSURIZER HEATER EXAMINATIONS 89-2606-M 6-23-89 89-8932-M 6-26-89 89-2650-M 6-27-89 89-2760-M 7-6-89 89-2772-M 7-7-89 89-2810-M 7-10-89 89-2955-M 7-18-89 89-4628-M 7-19-89 89-3274-M 8-5-89 89-3313-M 8-7-89 89-3405-M 8-11-89
CALVERT CLIFFS UNIT NO. 2 QC-CALL NOS. PRESSURIZER HEATER EXAMINATIONS 89-3031-M 7-22-89 89-3037-M 7-22-89 i 89-3039-M 7-23-89 89-3056-M 7-24-89 89-3060-M 7-24-89 89-3082-M 7-25-89 89-3121-M 7-27-89 89-3149-M 7-28-89 89-3167-M 7-29-89 89-3214-M 8-1-89 89-3234-M 8-2-89 89-3251-M 8-3-89 89-3269-M 8-4-89 89-3270-M 8-4-89 89-3313-M P-7-89
iI o UNIT 1 VT/PT 1 I _____________-__________-______-___-D
Ms. b ID-6II NONDESTRUCTIVE TESTING REPORT M. R. No. 2-@ - I '5 7- E 5 2 -L Q. C. Call No. 5 cc knM Dk dedy W. A. T. No. MA Syatem No. O G> 4 Pirnt D J d C A
- h I Unit MDI Date bc I (o l#1M Cerrponent Nvf55vv-s'iC/ Nab Slet.ucI Csmponent Location 460 e\cocN*oD - U~AV Yves s ., < . .za' l6_cf $4 6 1 Aras Examined \* 6><t> owc _ ucA1 c 4 c 0 D<<< . l .$A 6, e[O djc c_.4
'T.h esh b $ut.1.
Mot: rial 'T ic.,ss1 4> .*.) Mot'l Temp. 7 5" "P Procedure No. 6. I oO R sv. (3 Surface Condition Ob- ' L is r' e_ Ib ws kc. A O Vi (V.T.) Data Sheet No. [ [ O ultksonics (U.T.) Dato Sheet No. Calibration Recorf No. O Eddy urrent (E.T.) Data Sheet No. \ Calibration Recer No. Dato Sheet No. k Technique Sheet Nok O Radiogro by (R.T.) 1 \ ; O Magnetic horfieles (M.T.) Dato She. No. Standard No. \ Msthed: O Conti nuous O Residual / Current: O AC O DC ON#DC Equipment: O '~ oil O Yoke Prc!ds O Centrol Conductor O Head Shot Perm. Magnet
/ C V' ible Fluorescent / Color Particles: i Dry O wet 7
@ liquid Penetrant (P.T.) Dato Sheet No. 8'l-l o-615- A . L l C Post Equisified l Pen 2trant Type: O Solvent Removable EWater Washable
[ Visible O Fluorescent / Penetrant - Developer Brand Name: Du 6(. b(k6 b Dsveloper Type: O Dry O Wet d onoqueous sATcH wo. Cleoner - Evaporation Time Som.h3 , Penetrant 7T\ WI l Zo ~ . 5 Developer 8 l qi 6, . 7.o l Pensteent - Dwell Time Dsvolopment Time / O -.L5 Cleoner um'Tc q l i Nc. Items Examined: If 5tcues No. Items Accepted:/2 51ce ,c.r No. Items Rejected: 4 No. Items with Questionable Indications Aso - C. Rom:rks: s>o rab.~c.ek. abs were. > aN . % d t-gc._.bs W s a v oNG.b e '"> Y Y MC .E.Nn D S. See D C. CN A{ o) Sch D eh
% .E. Al D G N$f OW-S DeJ
- C (4V tb 5 .
1 I l Examiner ~ Leveth Report Reviewe u - lbA Date _klDN l Date Report and Attachment Received by CC.0009 (M-4181) 7ees
i l NDE Data Sheet No. 89-10-615A CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS 1 Unit No. 1 H; star Sleeve No. D4 SURFACE PREPARATION / CLEANING Sloove Ib Commints Minor scars frorn cleaninc oueration "J" Groove Weld Cine;nts No recordable indications i NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X Racults confirmed by second PT examination: Yes No X Crmm2nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R2 ults confirmed by second PT examination: Yes No X C mm:nts No recordable indications Eddy Current Examination Results Slcove No recordable indications "J" Groove Weld No recordable indications Reviewed By: - Supervisor - NDE Unit Kh%_
- p. . .
7 NDE Data Sheet No. 89-10-6150
-CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 'l
'H3ctor Sleeve No. 'B4 SURFACE.' PREPARATION / CLEANING Slosve ID C:mmsnts Minor scars from cleanine coeration "J" Groove Weld-C:mmants No recordable indications NONDESTRUCTIVE EXAMINATION e
. Liquid Penetrant Examination of Sleeves
' Indication: Yes- No X iR2 cults confirmed by second PT examination: Yes No X
'Crmm2nts No recordeble indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X
,Racults confirmed by second PT examination: Yes No X Ccmmants No recordable indications
- Eddy Current Examination Results Sisove No recordable indications "J" Groove Weld No recordable indications Reviewed By: % ~
Supervisor - NDE Unit
(
)
p NDE Data Sheet No. 89-10-615C , i i CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS j l I i Unit No. 1 H:: tar Sleeve No. D3 SURFACE PREPARATION / CLEANING Sicava ID Comm;nts Minor scars from cleaninc overation "J" Groove Weld Comm:nts No recordable indications NONDESTRUCTIVE EXAMINATION
. Liquid Penetrant Examination of Sleeves Indicction: .Yes No . X Rx ults confirmed by second PT examination: Yes No X C:mm2nts No recordable indications Liquid Penetrant Examination of "J" Groove Veld Indication: Yes No X Ruults confirmed by second PT examination: Yes No X C:mm:nts No recordable indications Eddy Current Examination Results Sic:vs No recordable indiestions "J" Groove Veld No recordable indications _
Revieved By: O es u, Supervisor - NDE Unit
NDE Data Sheet No. 89-10-615-D CALVERT CLIFTS PRESSURIZER HEATER PENETRATIONS Unit No. 1 Butor Sleeve No. C3 SURFACE PREPARATION / CLEANING Slesve ID C:mmsnts Minor scary from clefnine eneration "J" Croove Veld Ccm:nents No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes . No X' Rssults confirmed by second PT examination: Yes No X Commente No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R cults confirmed by cecond PT examination: Yes No X Comments No recordable indications l l Eddy Current Examination Results Sleeve No recordable indications
*J" Groove Weld _No recordable indications Reviewed By: ( M ~--
Supervisor - NDE Unit' L ..
i y , NDE Data Sheet No. 89-10-615-E I CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS i I Unit No. 1 H33tsr Sleeve No. B3 SURFACE PREPARATION / CLEANING S12sva ID C:mm:nts Minor scars froin cleaninc overstion "J" Croove Weld Commsuts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indicstion: Yes No X R2 cults confirmed by second PT examination: Yes No X C mmints No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Racults confirmed by second PT examination: Yes No X Crum:nts No recordable indications Eddy Current Examination Results S1cwo No recordable indications "J" Groove Weld No recordable indications Reviewed By: v A Supervisor - NDE Unit
.- ,__ _ __ _ - _ - _ _ _ _ - - -_ -_ _ _ _ _ _ . _ _ _ - - = - _ _ _ _
.j s a V ,
p; NDF Data Sheet No. fL 10-613-F i CALVERT CLIFFS. PRESSURIZER HEATER PFEETRATIONS I t.
!'JUnitNo.
~
1
'H ater' Sleeve No.. D2 l SURFACE PREPARATION / CLEANING S1save ID Gramants .,_flinos scars from clearine.coeration "1". Groove Weld Commsnts No recordable indications i . .
NONDESTRUCTIVE EXAMINATION'
.. Liquid' Penetrant Examination of Sleeves Indication: _Yes No- X
- Rasults-confirmed-by second.PT examination: Yes -No X Comm3nts No recordable indications Liquid Penetrant Exam'ination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X Comm2nts No recordable indications Eddy Current Examination Results Sloave No recordable indications 1
"J" Groove Weld No recordable it.dications Reviewed By: - Whas Supervisor - NDE Unit .
NDE Data Sheet No. 89-10-615-G CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS l Unit No. 1 Hantor Sleeve No. C2 ' SURFACE PREPARATION / GLEANING
$1save ID C mm:nts Minor scars from cleaninc ooeration s _
"J" Groove Weld Cow 2nts No recordable indications l
i NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X R2sults confirmed by second PT examination: Yes No X Commtnts No up_7,I1,able indications
- Liquid Penetrant Examination of "J" Groove Weld Indicction: Yes No X Rasults confirmed by second PT examination: Yes No X Comm2nts No recordable indiertions Eddy Current Examination Results Slsave .,,,,Eg_,rsc ordabl e indi c a tions "J" Groove Weld No recordable indications 1
Reviewed By: (-- - 652B oha~ Supervisor - NDE Unit
f .s < t a s e u :
,y'.,
NDE Data Sheet No. 89-10-615-H
. ,11 h .
I - CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS. t , l 't.' Unit No. 'l 3 3 H ccer Sleeve No. B2-1 SURFACE. PREPARATION / CLEANING Sidove ID
'C:mments- Minor scars from cleanine'oneration
' "J" Groove Wald
-Cimments No recordable indications NONDESTRUCTIVE EXAMINATION L
L
. Liquid Penetrant Examination of Sleeves -
" ' Indication: 'Yes; No 2 R3::ults confirmed by second PT examination: Yes No X Ccaments: No recordable indications
> Liquid' Par.etrant Examination of "J" Groove Veld Indication: Yes No X R0 cults confirmed by.second PT examination: Yes No X Cemments' No recordable indications ,
L l Eddy Current Exas.ination Result.i
.Sloove No' recordable indications ,
e "J"' Groove > Weld No recordable ind_ipations _ Reviewed By: - N-Supervisor - NDE Unic
1 1 i 1 NDE Data Sheet No. 89-10-615-I CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS I l Unit No. 1 l I H2stsr Sleeve No. A7 _ SURFACE PREPARATION / CLEANING S1ssve ID C:mments , Minor scars from cleaninc operation "J" Groove Weld Comm:nts No recordabte indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X _ Rasults confirmed by second PT examination.: Yes No X
, Ccmm:nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Results confirmed by second PT examination: Yes No X C:mm:nts No recordable indications Eddy Current Examination Results i S1 cave No recordable indications l
"J" Groove Weld No recordable indications l
\ k l \ Reviewed By: h 2 V of *% Supervisor - NDE Unit' l l u - _ - - - - _ - _ - - _ _ _ - - - _
I NDE Data Sheet No. ff-10-615-J l CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS f j Unit No. 1 4 H2:ter Sleeve No. D1 SURFACE PREPARATION / CLEANING Sicsve ID C:mnents Minor scars from cleaning oneration "J" Croove Weld i:omments No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X Raaults confirmed by second PT examination: Yes No X Comments No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X Comments No recordable indications l l Eddy Current Examination Results l ( Sicsve No recordable indications "J" Croove Weld No recordable indications Reviewed By: _ Sh hxk_ Supervisor - NDE Unit l
w - 1
- s. q I
~
3 NDE Data Sheet.No. 89-10-615-K CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS h Unic'No. 1 Hhedar Sleeve No. El e
' SURFACE PREPARATION / CLEANING. ,
Slosve:ID Ccausants - Minor scars from cleanine oneration
~
~" J" Groove Wald'
-Ccam nts- No recordable indications NONDESTRUCTIVE EXAMINATION-
-Liquid' Penetrant. Examination o'f Sleeves-
-Indication: Yes No X
- Roaults confirmed by second PT examination: Yes No X Commsnts No' recordable indications Liquid Penetrant Examination of "J" Croove Weld Indication: 'Yes No X Results confirmed by second PT examination: Yes No X Comm2nts No recordable indications IEddy Current Examination Results
~ Sleeve' No recordable indications
' "J" Croove Weld No recordable indientions Reviewed By: -
u Ge upervisor - NDE Unit
NDE Data Sheet No. 89-10-615-L CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 1 H;ctor Sleeve No. Al SURFACE PREPARATION / CLEANING Sloave ID Cnmm;;nts Minor scars from cleaning operation "J" Groove Weld Com:nsnts No recordable indications NONDEST4tUCTIVE EXAMIIMTION Liquid Penetrant Examination of Sleeves ; Indication: Yes No X Rscults confirmed by second PT examination: Yes No X Comm3nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R2 ults confirmed by second PT examination: Yes No X Commsnts No recordable indications Eddy Current Exatnination Results Sic 2ve No recordable indications "J" Groove Weld No recordable indications Reviewed By: ( M - Supervisor - NDE Unit
1
)
I 1 I UNIT 2 VT/PT I I
- - - -- --- - - - _-_u
Ns. OS~lD'753 NONDESTRUCTIVE TESTING REPORT Q. C. Call No. NI'O C' I M. R. No. 80%-l 3 7 MI - W W.A.T.No. ALA - System No. ObY ed v G d C.e { d b Unit b 2- Date AW. Il 1989 PI:nt Camponent cc 5 3 u . e.e - -l v 5(ee.uer Ctmponent Location 45N @_a kD - Uud& b55 we rlu { c. gu- M Arso Examined .\" C. . .sc. w g (1 c._f Q ov ,,f l . x .t o
~
q,o.{/,a,,, gjg e.J
}D 00 SY*ues Rev. 6 M2tsriot 'L"c o- ed (o c c> Mot'l Temp. ~/5 ' F Procedure No. 5 Eo o Surface Condition C\E^ e -
- u ,4 6 < -yd O Visuo T.) Dato Sheet No. ]
\
Ultrasonics)(U.T.) Dato Sheet No. Calibration Record No. f C Eddy Currert (E.T.) Data Sheet No. ,/ Calibration Record No. ,
/
O Radiograph (R.T.) Dato Sheet No.
/
[ Technique Sheet No. [
/
O Magnetic articles (M.T.) DotoShe tNo. Standard No. [ M2thod: O Co inuous O Residual / Current: O AC O DC O NWDC Head Shot Equipment: p Coil Yoke O Prods O Centrol Conductor 1 Perm. Magnet Particles: Dry Wet / Visi e O Fluorescent / Color: N v Data Sheet No._89 75 3. A.'g6 [ Liquid Penetrant (P.T.) Pen:trant Type: O Solvent Removable dWater Washoble O Post gulsified
/ Penetront - Developer Brand Nome: Ud 8(. -C, }\ 6 (
dVisible O Fluorescent Daveloper Type: O Dry O Wet honoqueous ' sATen No. Cicener - Evaporation Time d o - .'.s s Penetrant 7 9 \tl7 Penetrant - Dwell Time 2_ o % - s Developer 8 (Q L(o 2.,o Davolopment Time / O - .'- S Cleaner L.U G E Q No. Items Examined: 28 5kme.$ No. Items Accepted: /3 5bs No. Items Reieeted: / 5 5hs No. Items with Questionable Indications 404 Remarks: N#1 % 5cn v_e c_ v o lved . h 9T' %A. d M,1 sy . h O C. C.Al tu o s SCcd aD o (- h.' .3 vcparIr k @cesa- d c M., 4Es.<G w 4-5. " / Ex miner b LeveT F
/
Report Reviewer) Auk I% Date S'b'N Date R: port and Attochment Received by
' CC 0009 (M.4181) 7ies
NDE Data Sheet No. 89-10-753-A [ CALVERT CLIFFS I'RESSURIZER HEATER PENETRATIONS l Unit No. 2 Heater Sleeve No. A2 SURFACE PREPARATION / CLEANING
' Sleeve ID Comments Minor scars from cleaninc oneration "J" Groove Veld Comments No recordable indications NONDESTRUCTIVE EXAtilNATION Liquid Penetrant Examination of Sleeves . Indication: Yes No X
( Results confirmed by second PT examination: Yes X No Comments No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Results confirmed by second PT examination: Yes X No Comments No recordable indications Eddy Current Examination Results Sleeve No recordable indications "J" Groove Weld No recordable indications Reviewed By: b k MN Supervisor - NDE Unit
NDE Data Sheet No. 89-10-753-B CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 Htater Sleeve No. . B1 SURFACE PREPARATION / CLEANING Sicsve ID Comments Minor ser.rs from cleaninc operation "J" Groove Weld 1 C:mments No recordable indications [ NONDESTRUCTIVE EXAMINATION P Liquid Penetrant Examination of Sleeves Indication: Yes No X R2 cults confirmed by second PT examination: Yes X No Comments No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults, confirmed by second PT examination: Yes X No !
)
Comments No recordable indications Eddy Current Examination Results j Slosve No recordable indications "J" Groove Weld No recordable indications l l Reviewed By: b3-Supervisor - NDE Unit I _ _ _ _ _____ _
NDE Data Sheet No. 89-10-753-C _ , CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 Hutsr Sleeve No. C1 SURFACE PREPARATION / CLEANING Sle2ve ID Comm:nts Minor scars from cleanine overation "J" Groove Weld Comments No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No R2:ults confirmed by second PT examination: Yes X No Commsnts One linear indication Liquid Penetrant Examination of "J" Croove Weld Indication: Yes No X R cults confirmed by second PT examination: Yes No X Comm2nts No recordable indications l l Eddy Current Examination Results Slosve No recordable indications j ) "J" Groove Weld No recordable indications t Reviewed By: , a 5.0 L k Supervisor - NDE Unit I l l
p
]
i NDE Data Sheet No. 89-10-753-D , I CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS j i a Unit No. 2 H25 tar Sleeve No. D1 SURFACE PREPARATION / CLEANING S1 cave ID C:mm nts Minor scars from cleanine overstion "J" Groove Weld Comm:nts No recordable indications t NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No Ratults confirmed by second PT examination: Yes X No Ctmm2nts Linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X C:mmsnts No recordable indications ( l Eddy Current Examination Results l S1 cave No rece,rdable indications i "J" Groove Weld No recordable indications l Reviewed By: hN Supervisor - NDE Unit k %- l \ _ _ - _ _ _ _ _ _ _ _ _ _ -
1 1 1 NDE Data Sheet No. 89-10-753-E , f . CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS ) L j l Unit No. 2 H;2 tar Sleeve No. El SURFACE PREPARATION / CLEANING Slo;ve ID C:mm:nts Minor scars from cleaninc oneration "J" Groove Weld C:mm2nts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves , Indication: Yes X No 13:ults confirmed by second PT examination: Yes X No C:mments Three linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X Comments No recordable indications Eddy Current Examination Results l Sissve No recordable indientions 1
"J" Groove Weld No recordable indications l
l Reviewed By: Id OM Supervisor - NDE Unit
-_. _ = - - _ .
I i NDE Data Sheet No. 89-10-753-F y I ( CA.LVERT CLIFFS P!tESSURIZER HEATER PENETRATIONS Unit No. 2 H2etar Sleeve No. F1 j SURFACE PREPARATION / CLEANING Slaave ID C:mmants Minor scars from ele minc overation "J" Groove Weld Crmmants No recordable indications NONDESTRUCTIVE EXAMINATION I Liquid Penetrant Examination of Sleeves Indication: Yes X No Rscults confirmed by second PT examination: Yes X No C mm2nts Six linear indications, Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R3aults confirmed by second PT examination: Yes No X Comm.nts No recordable indications Eddy Current Examination Results l Slasve No recordable indications l l
- "J" Croove Weld No recordable indications l
l l Reviewed By: b Tb Supervisor - NDE Unit l l 1
rc . NDE Data Sheet No.- 89-10-753-G
'CALVERT' CLIFFS PRESSURIZER HEATER PENETRATIONS It r Unit'No. '2 H2 star. Sleeve No. GI-b
, SURFACE PREPARATION / CLEANING' Slesve ID Commsnts Minor scars from cleanine overation
)
*J" Croove Weld L- Commants No recordable indications NONDESTRUCTIVE' EXAMINATION-
' Liquid' Penetrant Examination of Sleeves ulndication: Yes X- No Rasults confirmed by second PT examination: Yes X No
. Ccam2nts Linear indications
' Liquid Penetrant Examination of "J" Croove Weld
. Indication: Yes-No X
-Rasults confirmed by second PT examination: Yes No X Comm3nts -No recordable indications Eddy Current Examination Results
'.'Slesve No recordable indications st; i
"J" Groove Weld No recordable indications
\. , Reviewed By: h4 - Supervisor - NDE Unit f.
p i i NDE Data Sheet No. 89-10-753-H i l CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 g H2ctar Sleeve No. El l SURFACE PREPARATION / CLEANING Sissve ID C:mmtnts Minor scars from cleaninc overation "J" Groove Veld Commints No recordable indications NONDESTRUCTIVE EXAMINATION u Liquid Penetrant Examination of Sleeves Indication: Yes X No Ru ults confirmed by second PT examination: Yes X No Ccmm:nts No recoedable indications Liquid Penetrant Examination of "J" Groove Weld' Indication: Yes _ No X Raeults, confirmed by second PT examination: Yes No X Comm2nts No recordable indications Eddy Current Examination Results Sissve No recordable indications ,
"J" Groove Weld No recordable indications Reviewed By: PM L I. k .bM L Supervisor - NDE Unit
i NDE Data Sheet Nc. 89-10-753-1 CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS
')l Unit No. 2 H20t r Sleeve No. J1 l- SURFACE PREPARATION / CLEANING S12;ve ID Crmm;nts Minor scars from cleaninc operation l
"J" Groove Weld Comm nts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No R3:ults confirmed by second PT examination: Yes X No C:mm2nts No recordable indications LLiquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Ra:ults confirmed by second PT examination: Yes No X Comm:nts No recordable indications Eddy Current Examination Results Slosve No recordable indications "J" Groove Veld No recordable indications Reviewed By: [N N bW Supervisor - NDE Unit
i l i j NDE Data Sheet No. 89-10-753-3 ) CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 l H star Sleeve No. K2 l SURFACE PREPARATION / CLEANING l: Sissve ID C:mm:nts Minor scars from cleaninc operation l
"J" Groove Weld Comm2nts No recordable ind!estions NONDESTRUCTIVE EXAMINATION
=, Liquid Penetrant Examination of Sleeves Indication: Yes X 1;o R3:ults confirmed by second PT examination: Yes X No C:mm:nts Linear indications Liquid Penetrant Examination of "J" Groove Veld Indication: Yes No X R2 cults confirmed by second PT examination: Yes No X Crmmints No recordabic- indications Eddy Current Examination Resulte Sleeve Linear indiestions of ID sleeve "J" Groove Weld No recordable indications 1 Reviewed By: b Tk b/b % Supervisor - NDE Unit
- , NDE Data Sheet No. _ 89-10-753-K CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 Heater Sleeve No. 01 SURFACE PREPARATION / CLEANING Sleeve ID Comments Minor scars from cleaninc oneration "J" Groove Weld Comments No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Fenetrant Examination of Sleeves Indication: Yes X No Results confirmed by second PT examination: Yes X No Comments Linear indications Liquid Penetrant Examination of "J" Groove Veld Indication: Yes No l Results confirmed by second PT examination: Yes No X Comments Linear indications Eddy Current Examination Results Sleeve Linear indications of ID sleeve "J" Groove Weld Linear indications at veld Reviewed By: tb h -
Supervisor - NDE Unit
y.__ _ . _
'i NDE Data Sheet No. 89-10-753-L i CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS l
l l Unit No. 2 y a H2ntor Sleeve No. Z1 SURFACE PREPARATION / CLEANING Slo:ve ID C:mm;nts _ Minor scars from cleaninc operation "J" Groove Weld C:mm;nts No recordable indications NONDESTRUCTIVE EXAMINATION
' Liquid Penetrant Examination of Sleeves Indication: Yes X No Racults confirmed by second PT examination: Yes X No C:mm:nts Four linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R2:ults confirmed by second PT examination: Yes X No C:mments No recordable indications Eddy Current Examination Results Slesve No recordable indications "J" Groove Weld No recordable indications Reviewed By: b N Ssdw%
Supervisor - NDE Unit
P NDE Data Sheet No. 89-10-753-M f CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. -2 Hantar Sleeve No. BB1 SURFACE PREPARATION / CLEANING SicOve ID C mm:nts Minor scars from cleanine operation "J" Groove Weld Commsnts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No Rruits confirmed by second PT examination: Yes X No C:mments Linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X
.R2 cults confirmed by second PT examination: Yes X No C:mm:nts No recordable indications Eddy Current Examination Results Slomve Linear indications "J" Groove Weld No recordable indications Reviewed By: vbsJks-Supervisor - NDE Unit
h s 9- NDE Data She'et No.'89-10-753-N CALVERT. CLIFFS PRES'SURIZER HEATER PENETRATIONS i'
- -Unit No.
2-Hnt::r Sleeve No. B2 SURFACE PREPARATION / CLEANING
.Slosve ID
, Ccamants' Minor scars from cleanine oreration l
"J" Groove Weld
- C:mmInts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant' Examination of Sleeves Indication: Yes X -No
-Racults confirmed by second PT examination: Yes X No
'C:mmints ' Linear indications Liquid Penetrant Examination of "J" Groove Weld
. Indication: Yes No X Rasults confirmed by second PT examination: Yes X No Crmm2nts No recordable indications Eddy Current Examination Results Sleeve No recordable indications "J" Groove Veld No recordable indications Reviewed By: . b 52 Bud ~
Supervisor - NDE Unit
NDE Data Sheet No. 89-10-753-0 CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 Heater Sleeve No. C2 EURFACE PREPARATION / CLEANING Sleeve ID Comments Minor scars from cleaninc operation "J" Groove Weld Comments No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No Results confirmed by second PT examination: Yes X No Comments Linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Results confirmed by second PT examination: Yes X No Comments No recordable indications _ Eddy Current Examination Results Sleeve No recordable indications l I l
"J" Groove Weld No recordable indications Reviewed By: - kt )[ bs.--
Supervisor - NDE Unit
7 NDE Data Sheet No. 80-10-753-P CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 H;ctar Sleeve No. D2 SURFACE PREPARATION / CLEANING Sic ve ID C:mm;nts Minor scars from cleaninc operation "J" Croove Weld Comm2nts No recordable indications l NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No R2 cults confirmed by second PT examination: Yes X No C mm:nts Linear indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes X No Comm:nts No recordable indications Eddy Current Examination Results l l Sissve No recordable indications l l l l "J" Groove Weld No recordable indications M i Reviewed By: - II -4/ l Supervisor - NDE Unit l l
i NDE Data Sheet No. 89-10-753-0 CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 H;2tsr Sleeve No. E2 SURFACE PREPARATION / CLEANING Slo:ve ID Crmm:nts Minor scars from cleaninc overation "J" Groove Weld Comm:nts No recordable indications i NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X Rssults confirmed by second PT examination: Yes X No Comm nts ,, No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rssults confirmed by second PT examination: Yes X No Comm2nts No recordable indications Tddy Current Examination Results Sissve No recordable indications l l ! "J" Groove Weld No recordable indications Reviewed By:
- M bE ~- /
Supervisor - NDE Unit
' 1 4 4 1
W. ' i Q A" ,
, t
, :n t :
.,)-'
'if >g. NDE Data Sheet No. 89-10 753-R'
. ; p. .
j_ CALVERT' CLIFFS PRESSURIZER HEATER PENETRATIONS-L
, . Unit-No.1 2 L. ' Haatsr , Sleeve No. 4 F2 e
f! SURFACE PREPARATION / CLEANING
! Sleave'ID'
'Ccam:nts Minor scars from cleanine c.oeration F
"J"' Groove ' Weld Commants ,,,,
No recordable indications NONDESTRUCTIVE EXAMINATION LLiqu'id Penetrant Examination of Sleeves
= Indication: Yes .,X,, No Rasults confirmed by second PT examination: Yes X Eo
- l. Ccam2nts- Three linear indicat; ions i Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confi.med by second PT examination: Yes X No
.Commsnts No' recordable indications
- Eddy Current Examination Results Slesve Three linear-indications "J" G: aove Weld No recordable indications Reviewed By: ed h kd~
Supervisor - NDE Unit
._ .__ __ _ _ _ - - - _ - - _ _ _ _ _ _ _ _ - _ _ _ _ - - _ _ _ - _ -__ - .l
NDE Data Sheet No. 89-10-753-S CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS
~
Unit No. 2
.H t r Sleeve No. G2 SURFACE PREPARATION / CLEANING S1cova ID C:mm:nts Minor scars from cleaninc overstion "J" Groove Weld Comments No recordable indications l
l NONDESTRUCTIVE EXAMINATION L Liquid Penetrant Examination of Sleeves Indication: Yes No . X Results confirmed by second PT examination: Yes X No Commints No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Results confirmed by second Fr examination: Yes X No Com:;nts No recordable indications Eddy Current Examination Results Sis:;ve No recordable indications l l "J" Groove Weld No recordable indications Reviewed By: ( 5 2. S ,gLm I Supervisor - NDE Unit
, NDE' Data Sheet No. 89-10-753-T i CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS j Unit No. 2 , i H2ator Sleeve No. J1 SURFACE PREPARATION / CLEANING l Sloave ID C:mm2nts _, Minor rears from cleanine ongation i
"J" Groove Wald Comm:nts No regordeble indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No Results confirmed by second PT examination: Yes X No Comm2nts No recordable indications Liquid Penetrant Exairination of ".T" Groove Vald Indication: Yes No X Rasults confirmed by second PT examination: Yes No X Comm2nts No recordable in-Jications
) Eddy Current Examination Results Slesve Linear indications 1 "J" Groove Ucid No recordable indications , 1 I- Reviewed By: CO 5 b btM-Supervisor - NDE Un'it I l
NDE Data Sheet No. 29-10-753-U CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 H utsr Sleeve No. . 01 SURFACE PREPARATION / CLEANING Slesva ID Comm:nts Minor scars from cleanine overation i
"J" Croove Weld Commsnts No recordable indications l
l NONDESTRUCTIVE EXAMINATION 1 { Liquid Penetrant Examination of Sleeves Indication: Yes X No , j R u ults confirmed by second PT examination: Yes X No ' Comments No recordable indications Liquid Penetrant Examination of "J" Croove Veld Indication: Yes No X - Raeults confirmed by second PT examination: Yes _ No X Commints No recordable indications i Eddy Current Examination Results Sistva ' Linear indications "J" Groove Weld No recordable indications I I Reviewed By: b d Is4k --- Supervisor - NDE Unit
L ! 1 i l I E Data Sheet No. 8 9 7 53 -V I CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 h H;at r Sleeve No. N2 _ _
~ SURFACE PREPARATION / CLEANING Slcsve ID C:mmInts Minor scars from cleaninc operation "J" Groove Weld Comm2nts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes X No R2 ults confirmed by second PT examination: Yes _,1._ No C mments No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X Comments No recordable indications __
l Eddy Current Examination Results l Sleave No recordable indications l "J" Groove Weld No recordable indications
/
Reviewed By: Sk % Supervisor - NDE Unit
.x.-. -I
- U' ' . f j<
L ..- d NDE Data' Sheet No. 89-10-753-U L CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit'No. 2 y b Hsster Sleeve No. AA2' SURFACE PREPARATION / CLEANING i-Slesve ID Comments- ' Minor scars from cleanine overation t
'"J' Groove Veld ~
Cennsents No recordable indications i NONDESTRUCTIVE EXAMINATION P Liquid Penetrant Examination of Sleeves vindication: .Yes No 'X Rssults confirmed by second PT examination: Yes X No Ccaments No recordable indications Liquid Penetrant Examination' of-"J" Groove Veld Indication: Yes No X Results confirmed by second PT examination: Yes X No
'Ccaments No recordable indications Eddy Current Examination Results Sleeve- No recordable indications i
l "J" Groove Veld- No recordable indications l l l Reviewed By: U & bk kU'b % Supervisor - NDE Unit l l' _ _ _ _ _ _ _ _ _ _ - _ _ _ _ - _ - _
1 i i J NDE Data Sheet No. J9-10-753-X CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 H2ctar Sleeve No. S22 SURFACE PREPARATION / CLEANING Sicssve ID Crmm2nts Minor scars from cleaninc operation "J" Groove Weld Comm2nts No recordable indications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X Ruults confirmed by second PT examination: Yes X No l Comm nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R2eults confirmed by second PT examination: Yes X No Crmm2nts No recordable indications Eddy Current Examination Results Slsave No recordable indications "J" Groove Weld No recordable indications Reviewed By: D N h,A/h w Supervisor - NDE Unit l l
NDE Data Sheet No. 89-10-753-Y l CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS l Unit No. 2 H:eter Sleeve No. D3 l SURFACE PREPARATION / CLEANING S1sove ID C:mmants Minor scars from cleaninc overatiert "J" Groove Weld Crmmints No recordable iridications NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X R2 cults confirmed by second PT examination: Yes X No Crmm:nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X R2 cults confirmed by second PT examination: Yes X No Comm2nts No recordable indications Eddy Current Examination Results Slosve No recordable indie p_ pions F . , _
"J" Groove Weld No recordable indications Reviewed By: .
bkbb% Supervisor - NDE Unit
y NDE Data Sheet No. 89-10-753-2 CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS i i Unit No. 2 H: star Sleeve No.- F3 SURFACE PREPARATION /CLEANINC 1 Slosve ID Crmm2nts Minor scars from cleaninc operation f
"J" Groove Weld Crmmsnes No recordable indications l
NONDESTRUCTIVE EXAMINATION Liquid Penetrant Examination of Sleeves ! Indication: Yes No X l R0sults confirmed by second PT examination: Yes X No l Comm:nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No ___ X., j R2eults, confirmed by second PT examination: Yes X No , Ccmmsnts No recordable indications l l Eddy Current Examination Results Slosve No recordable indications "J" Groove Weld No re w dable indications i I Reviewed By: Supervisor - NDE Unit h Ih hud% l l
1
)
NDE Data Sheet No. 89-10-753-AA CALVERT CLIFFS PRESSURIZER HFATER PENETRATIONS Unit No. 2 H stor Sleeve No. H3 SURFACE PREPARATION / CLEANING Sic 2ve ID Comm:nts Minor scars from cleaninc operation "J" Croove Weld Comm:nts No recordable indications NONDESTRUCTIVE EKAKINATION Liquid Penetrant Examination of Sleeves Indication: Yes No X R2eults confirmed by second PT examination: Yes No X Comm:nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rasults confirmed by second PT examination: Yes No X C:mm:nts No recordable indications , l Eddy Current Examination Results Slosve No recordable indications "J" Groove Veld No recordable indications l Reviewed By: b k bb% l Supervisor - NDE Unit I
g NDE Data Sheet No. 89-10-753-BB CALVERT CLIFFS PRESSURIZER HEATER PENETRATIONS Unit No. 2 H; star Sleeve No. HH4 l I
' SURFACE PREPARATION / CLEANING Sissve ID Comm:nts Minor scars from cleaninc operation "J" Groove Weld Cammtnts No recordable indications NONDESTRUCTIVE EXAMINATION L
Liquid Penetrant Examination of Sleeves Indication: Yes No X l Ru ults confirmed by second PT examination: Yes X No Crmm2nts No recordable indications Liquid Penetrant Examination of "J" Groove Weld Indication: Yes No X Rseults confirmed by second PT examination: Yes X No Comm:nts No recordable indications Eddy Current Examination Results Slcove No recordable indications "J" Croove Weld No recordable indications Reviewed By: b bb v% Supervisor - NDE Unit
l UNIT 1 ET ZETEC 4
)
i . _ _ _ _ _ _ _ _ _
No. bS~ l 0 - b O S NONDESTRUCTIVE TESTING REPORT I M. R. No. Zo T- 15 7- Z 5 Z- L' Q. C. Call No. '~3406 W.A. No. MA System No. ObH verb C!NS Unit Mo' t- Date kus vst 11, t 'i SCi Plant ' Component be n wri tV Ne cd& 6 \e c~c.5 ' Component Location a 4C' 6levd .ob UMu A1. . I Ore s s w e i s.e/ e3 Le w b, M Area Examined ID C D C.4 bo wJ of 0c-cl- 5\ceve vs.Se b bk.) t ,h t Pc co:b .
. Material .1vcs ved bo o Mot'l Temp, 75*F Procedure No. M Rev. Vr f
Surface Condition C.\ch o oS wM % sled Ch ) O Visual (V.T.) f Dato Sheet No. ,! f Dato Sheet No. f Calibration Record No. [ C Ultrasonics (UfT.) , , IEddy Current (E.T.) Doto Sheet No. 09. b-6 o 3 6 Calibration Record No. M - N -6 o 3- A-C.% K O Radiography (R.T.) Data Sheet No. 1
/ Technique Sheet No.
i
/
O Magnetic P rticles (M.T.) Data Sheet No. / Standard No. / , Msthod: O Cont nuous O Residual / Curr / t: O AC O DC C HWDC
' Equipment: Coil O Yoke Prods C Centrol Conductor O H ad Shot Perm. Magnet Particles: ; Dry C Wet / O Visible O Fluorescent / Color:
I C Liqui Penetront (P.T.) Deto Sheet No. / _ l l Psnstrant Ty O Solvent Removable C eter Washoble O Post Emulsi ied
/ Penet nt - Developer Brand Home:
O Visi le O Fluorescent Developer T pe: O Dry C Wet O N naqueous f sarew wo. )
.Cisener - vaporation Time Penetron/ !
l
/ Develop /r Penstrant Dwell Time Developm nt Time / Cleoner/ !
I I l No. Items Examined: 12 s\mes No. ' Items Accepted: l ? 5 tecas.s No. Items Rejected: -c l N o. Items with Questionable indications ^) o C-Remarks: $ kC.c vb k [o,.O s c.d S eM s.'s o [ M( w c .g Qs.h M (\ b A' $4c . O fo s u Ed . 2d c. c. Yo c.4 L e_, S 'T- 5 P 3 o\- l 6 b . 6~ t L hus-lA.> c~L vs? su\ Eu% (L u 4 n e. ased L 4L:s w 4,a. ; l A A\Emzd EAAl sOt.4e. L:\ (_M.sd e.p JA.D w 3 v4e4 & hEv- W c~cce /yer w wL ske . l-l l u) l Examiner C"'i).bvc1(' Level Y A Report Reviewer Date 8U Repcrt and Attochment Received by Date C C.0809 (M-4181) 7/86
I i Zetec, Inc..was contracted to perform an eddy current inspection at Calvert Cliffs Nuclear Power Plant. The inspection was performed on Unit 1 pressurizer.using a MIZ-18 Remote Acquisition Unit.along with a DDA-4' Analysis System. -Tubing type was 1.156-inch 0.D.'by 0.124-inch tube wall.Inconel 600 with each sleeve approximately 19 inches in length. Frequencies selected were 100 kHz differential / absolute 65 kHz differential / absolute, 35 kHz differential / absolute and 10 kHz-differential / absolute. Probe type was a .860 MRPC combined with a 1 PM-1 and 4D probe pusher. Pull speed was 0.3 inch per second with a rotation of 240 rpm. No strip charts were generated. The standard was supplied by CCNPP Metal Lab, Serial Z-6695. I Initial analysis was performed at CCNPP on August 11, 1989. Further analysis was performed by Lewis J. Lucier and Scott Alspaugh at Zetec on August 14, 1989. There were three indications reported to be "possible axial ^ indications." These indications, in my opinion, are either an I.D. ridge mark or a small volume I.D. scratch. Two indications (Tubes B3 and D3) exhibit indications in the free span tubing below the pressurizer shell. One indication (Tube C2) was reported to be associated with.the "J" weld. This report will be maintained as an addendum to the final report filed August 1989 by Karl Seeger,'Zetec, Inc. Lewis J . Lucier Zetec Level IIA August 16, 1989
M- s o-4,o 8 - A l OWNER B. G. & E. CHAN 1 2 3 4 5 6 7 9 ! PLANT CCNPP 00 FREO 100 55 35 10 10 UNIT 01 DATE 08/11/89 SPAN 40 40 40 40 1525 PRESS 01 LES ROT 329 55 126 .255 129 l TAPE NO. 01 TO 01 COIL 1 1 1 1 4 OPER. LVLL.J.LUCIER / IIA OPER. LVL / CHAN 9 10 11 12 13 14 15 16 (. ASME S/N 2-6595 FREQ STD S/N SPAN SIZE 1.1550.D.X0.124 ROT MATERIAL INCONEL 600 COIL PROSE TYPE A.860-LC/LF MFG / LENGTH ZETEC /50 FT MIZ-18 ACQUISITION EDITION 18.5 REV5.2 PROBE EXT: MFG ZETEC TYPE 16-0A/16-00A LENGTH 10/100 FT STADARD ACTUALS: 100/48/20 EDM 90 DEGREES CURC NOTCHES 100/79/60 DRILL HOLE IS 0.075" DIA WITH FLAT BOTTOM HOLES SPACED 2.0" APART EDM NOTCHES ARE SPACEO 1.5" APART - I.D. 15 0.505" TUBES ARE 4AND PULLED AND ARE APPR0xIMATELY 19.0" LONG EVALUATED BY: L. J.t_UCIER :I A ZETEC 05/14,55
8').u -bn- b [ PLANT UNIT PFE5 LEG REEL TO REEL DATE i CCNFP 0D-1 01 01 01 01 08/11/89 [ ID STD VOLTS DEG % CH: LOCATION EXTENT l [ CALVERT CLIFF 5 UNIT 1 PRE 55URIZER TAPE 21 DD-1
.850-MRPC PROBE 08/11/89 L.J.LUCIER IIA 0700 HR5 l
HAND HELD RECORDING. TUBE PULL TERMINATED PRIOR TD EXITING TUEE END. DUE TO DISTORTION OF THE THRU WALL HOLE. THE i PROBE WILL SE CALIBRATED ON THE 48% FLAT BOTTOM HOLE. DIAMETER OF 48% = 0.125". 1 0 001 BTS j 1 0 201 ETS i 1 0 A01 BTS 1 1 1 0 50: 354.0 :u .W +1:45.0T0+ 0.0 ET5 ! APT : J WELD - 5.1: ETS E0: POSSIBLE AXIAL INDICATION EXTENDING FROM 802 "J" WELD - 6.3T" TO "J" WELD - 11.15" 1 0 DO: 354.0 APT L = U +1:58.0T0+ 0.0 BTS APT J WELD - 7.03 STS D0: FOSSISLE A/IAL INDICATION EXTENDING FROM D0: 'J" WELD - E.05" TO "J' WELD - 10.44" 1 0 '0: 354.0 : L U - 135.070+ 0.0 STE nFT : J WEL: - 0.!4 ETE 1 0 D04 ET5 1 0 B04 BT5 1 0 AO: BT5 1 0 E03 354.0 : Ls W - 550.0T0+ 0.0 GT5 APT 2 J WELD - 11.25 BT5 254.0 : L W - 0.0T0+ 0.0 BTS AFT : J WELD - 1:.50 BT5 1 0 D03 364.0 : L^W + 3:4.0T0+ 0.0 BTS l APT J WELD - 11.59 BTS f 1 0 C03 - 5.54 GTS
- 5.33 BTS 1 0 C03 AFT : J WELD - T.78 BT5 364.0 0 0 : Ls W +1265.0T0+ 0.0 BTS C03 FDESIBLE AXIAL INDICATION EXTENDING FROM C03 "J" WELD - 6.54" TO "J" WELD - 6.83" END TAFE il DD-1 08/11/89 L.J.LUCIER IIA 0930 HR$
f l PAGE ! 0F 1 EVALUAT0p LE')EL
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} POINTS 4CAN 106 PLANT UNIT PPES LEG DATE BLF 2315 CCHPF 00-1 01 01 03'11'93
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,-t /./ FOINTS SCAN 105, PLANT UNIT PRES LEO DLTE BLK 3295 CCHPP 00-1 01 O! 08/11'B9
$%iO= bO$ ~ 0
- CH 2 UERT .l CHAttHEL NO -- 2 lIO 1 TUE O LOS CHAus -- 2 FF EQ ---- 65 kHz
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- POTATIOtt 310 l '* ROTCTION 60 I l
- OF 3CANI PO! HTS' SCAN 1 04.
15 PLANT UNIT FFE5 LEO DATE Bu. 6521 cc urs OD-1 01 01 OY/11 '99
. cw ; vg;T .i CHANNEL H0 -- 2 jfL 1 TUE O COI
- 2. a ; F , -e . n ;f.ci = .s.+mii2 HIDTH = 2?2 -1.O*C0!L= 0 (gan ..
ll I LENGTM= 240 -1.0* COIL = 0 A5 kH** FFE0
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A' POTATIDH 310 0 ROTATION O
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- OF 3 CANS 15 i I) m & 'v*' PCINTS/SCAH 106 UNIT PEES LEO DATE BLK 6321 PLANT CCNPP DD-1 01 O! 08'11'89
hh*W{&#h i j
- CH 2 VERT +l CHANNEL HO -- 2 lID 1 TUB 0 B03 CHQH# -- 2 FFEQ 65 kHz SPAN 40.
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- OF $ CANS 27 J WE D - 11.1 POINTS / SCAN 104 PLANT Uu!T FEEE LES DATE BLK 6921 COFF 00-1 01 01 0s <11 '29
. cn 3s. EFT +j CHAH'iEL 'O - 2
{10 1 TUB B E03 CL;F L -1.06" CGIL = E6*miss WIOTH s 2E1 -1.O*C0!La 0 . CHAN* ~~
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/ # OF SCAHS 27 J WELD - 11.1 'Y POINTS / SCAN 164 PLAHT UNIT FRES LEO DATE BLK 6921 CCt4PP 00-1 01 O! 03 11 09
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- CW 2 VEET -l GL;F s n .it j G'IL = is4nitis
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l
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.- X ROTf. TION e OF SCANS 53 0
i J WELD l*%11.5 --' Po!HTE'?CAN 105 PLANT UNIT FPES LE0 DATE BLK 8306 CCHPP DD-1 01 01 03/11/89 1
8%o-6 e p IC I
- CH 2 VEPT +l CHANT 4EL HO -- 2 lID 1 TUB B CBS CHAH+ -- 2 FEEQ ----- 65 kH:
SPAN 40 50TATION - "6 DED f _- 1. 51 b r. ~1.51]5
\ +
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-1.6 180 0
/
J b' '- MAX VOLTS 8.1 0 'I'01 QX1AL PITCH 70 CIRC PITCH 27 POTATION 310 X ROTATION 60
- OF 3CAN3 45)
PO!HT D TC AN 99l PLANT UNIT PEES LEG DATE ELV 8839 CCUPD DD-1 01 01 M.11 99 CHANHEL NO - 1 JID 1 TUS O C03 l - CH 2 ' 'EC T -} CLIF i. +0. :2 -a CUIL
- iE 4no 12 utDTH = 18E -1.0+C01L= 0 .
LENGTH =1652 -1.0+C01L= 1266 9A"*~~ e LH: FEEu ---- '.' i Anctg . 9 iPAH 40 50TATIOH - % DEO q o _ -1.51 3: ;..
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- OF SCAH$ 45
'/' SoIHTsetCAu 99 PLANT UNIT PPES LEG DATE BLA 0839 CCHPP DD-1 01 01 09/11 E9
- 9 4 .
O 9 I h \ [ a O LA L i s
No. O$*IU* N NONDESTRUCTIVE TESTING REPORT M.R.No. M -l 3~2 "2 il - '- Q. C. Call No. M - 3 2. 4 b - A f-W. A. T. No. MA System No. % 'i Plant b ON CM. NI Unit M6- ~2- Date ko s - O 1985 l Component Mo.2.1 Pcc s s w. t.sv ba.Av Mecy 3 Component Location ho Devy . 4 S O .e.10 s c.k . s3 - e A.N 9 ee r.s w. t h { o g (cM Area Examined ~3TC) db & Yw J o 4 0.c-cl. s\ecsc. vs.2 ( /A [l Q C. b\,13,.O ' (l. d C v o 5.5 k -4.'s Dval.O. Material ~T'.s c ., A4 (ooo ' Mot'l Temp. 75 F Procedure No. 6ec_ L V-4 Rev. - Surface Condition C \eu o o-4 u+e b wsled O Visvol (V.T.) f Data Sheet No. f f
/ Calibration Record No. [
C Ultrasonics f.T.)Data Sheet No. , , dddy Current (E.T.) Dato Sheet No.85-f o B-V Calibration Record No. S'i-t D- loli- 4
/ Technique Sheet No. [
O Radiography (R.T.)Dato Sheet No. , j O Magnetic Particles (M.T.) Dato Sheet No. [ Stonderd No. / Method: OC 'inuous O Residual / Curr n / t: O AC C DC O HWDC Equipment: Coil C Yoke O Prods O Centrol Conductor O He d Shot O Perm. Magnet O Visibi O Fluorescent / Color: Particles: O Dry C Wet / . O Liq [id Penetrant (P.T.) Dato Sheet No Penstront ype: O Solvent Removable Water Washable O Post Emuls' ied
/ Pen trent - Developer Brand Nome:
O V'sible C Fluorescent Develope Type: O Dry C Wet O onoqueous [l 8A? CH NO. Evaporation Time Penetrorf Cisoner Develop'er Penstr t - Dwell Time / Devel pment Time / Cloone/ I I No. Items Examined:28 $\cesc.s No. Items Accepted: ZZ Sb S No. Items Rejected: -G-- No. Items with Questionable Indicofions b RemarksM 6M..,kb pd._d L Zdec. .Juc., pq3_, d , Y con ed,d o ckc c.A A s ad y 5'. s wc a p M w - - M J C c c cs k - c f_ m ..j{. We.c, b wL.<c Tse 3et L a A rd.9c. au. :-E.o2. s . 9 51 % L4 .J.;. 6en Y c.ou\L osak k Cas-(.?-ci c ~c% swke e:{f 0ek. A w o).L C~ ' b l.~ A= q bg b b e k w 7 -.e . 5 kAl be_ vse.1 -{o {A,,.,t o k k eadic d shf c:. d k c_ g , g , [ , g , I
- CM Eek. sr .
"b" DE Level T Report Reviewer h# Date .,
Examiner Do*e Repert and Attochment Received by C C.0809 f u.d181t 7/86
t CAAN 2 3 a 5 6 7 E h
- WNER PLANT EGE CCNPD DD-02 FREQ 100 65 30 10 10 UNIT 02 DATE 08/02/89 SPAN 28 41 32 10 i304 PRESS LEG ROT 33? 59 138 236 1?
l TAPE NO. 02 TO 02 COIL a L OPER. LVL K. SEEGER / IIA OPER. LVL / CHAN 9 :0 t' 12 '3 14 '5 '6 ASME S/N Z-6695 PREC STD S/N SPAN SIZE 1.1560.D.X0. 24 RDT MATERIAL INCONEL 600 COIL PROBE TYPE 870-MRPC MFG / LENGTH ZETEC / SOFT MIZ-18 ACQUISITION EDITION 18.6 REV5.2 PROBE EXT: MFG ZETEC INC TYPE LENG'H 100 FT STANDARD ACTUALS 100%, 48%. 20%. EDM 90 DEG CURC NOTCHES 100%, 79% 60 DRILL HOLE IS 0.067" DIA x 2.0" APART EDM NOTCHES ARE 1.5" APART ID IS 0.905" TUBES ARE HAND PULLED, APRX. 19" LONG EVALUATED BY: K.SEEGER IIA 08/02/89 ZETEC INC. q 4
-- -------_----__-----------_a
87-se-f n-6 e p ,- .m"i T .:NI- : P. r >^ _ _r , oc;'-- .n. m.r.. t ' DATE. 08/02/89 ( CCNPD DD-02 02 02 02 f I :J LmL
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vny1_- c_ ./ >t.s l . 3 CALVERT CLIF;S IJNIT 2 PRESSURIZER TAPE #02 DD-02 ) START OF 870-MRPC PROBE TEST K. SEEGER IIA 08/02/89 C 0 2 NDD BTS-N 0 2 NDD BTS A A 2 NDD BTS S 0 2 f4DD BTS
- 0 2 NDD BTS r D 0 2 NDD STS B 0 2 NDD BTS A 0 i NDD BTS B 0 i NDD BTS D 0 NDD BTS J 0 1 NDD BTS G 0-
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- - - . - - _ __ -w S41o UI C
-H c. JEF T .. ~t-APNEL NO -- 2 J 6 i;
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OCHF P :D-92 31 08/6E M
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.EnGTH=1624 -1.iWCOILw 602 FEEQ 65 kH: -
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- A.& -- O I NT S.'SC AN 121l P'_ f NT .'H I T : C'E E :.EO DATE CC:FP CD-M 92 38'e2 '?*
1
v
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. 0 +1.6 Mfd VOLTS d.M t \ N s,'
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'~, ' SCTAT:ON 6At
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ELD - O.2 en:9T?, SCAN 1291 60 DLfsNT ONI* TC c 3 t.E .~. Df4TE i:Lr 6298 CCisF P 00-90 02 08/02/99
.H 2 dERT -- ' Hf*NNEL NO ~ E G 0 l' CL;P v +1.$9u . Coll = diamlis-
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AIDTH = i.57 -1.6*COli* LC'4GTH: &."' -1.s*00! a g 50 b
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- LiaNT ONIT :*EE ,,,t G ^ DATE CCHPF DD-62 A2 R 89
3 %
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- 4 II ?.CAHi 5 51
' 50!NTS. SCAN 110 I
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- b H e $ -
[ .L6 CH 2 VERT +4 CHANNEL 64 -- 2 3 B 1: R '
,1 ;P .e +2.27v $ f, OIL = *t2mti5 i I l 3 iWIDTH = 452 -1.3*C0!L= 2O CtAN# ~ 2 1
* ' J.HGTb=1479 -1.O* COIL = 257
. i
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- OF SCAHS 6 51 gj p, c, DOINT5/ SCAN 1181 60 &LANT UNIT FREE LEO DATE C C:<F O 00- 2 32 06.-62/89 CH 2 VEF.T +- CPPPHEL 40 - E- E- E. 11
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gs .o-m - G q l' 1! CHANNEL HO ~ 2 R D
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SUMMARY
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AMDATA, INC. performed field addy current imaging of pressurizer hester sleeves in Units 1 and 2. Data acquisition took.placa beginning Wednesday, August 30, 1989 and was completed on Thursday, September 7, 1989. A total of 17 sleeves and Twelve sleeves. two nozzles were inspected in the Unit 2 pressurizer. representing 10% of the sleeves were inspected in the Unit L pressurizer. The purpose of inspecting Unit 2 was to determine the reliability-This was achieved br cf AMDATA's addy current imaging techn:lque. inspecting a population of known leaking sleeves along with a few non-leaking sleeves in the Unit 2 pressurizer. The Unit 2 pressurizer inspections could then provide a quantitative cvaluation of addy current imaging as applied to pressurizer heater sleeves. If confidence levels wereA high enough, then the preliminary review of Unit 1 pressurizer was to be inspected. Unit 2 data showed very good correlation and therefore Unit I. was. then inspected. The attached tables shew the imaging inspection results. Sene et the conclusions that can be drawn include:
- All indications in Unit 2 are axial in nature.
- There were no indications in Unit i except for a very small a=plitude signal from sleeve C2 in the weld.
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- All Unit 2 indications cccurred in the region of the sean.
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- Ncne of then exceeded a measured length of 1.5".
- Sc=e sleeves showed axial cracks abcVe the weld, but none in er through the veld.
- High frequency (250 KHz) data provides better spacial resciution t.han at 100 or 65 KHz.
is forthcoming. A formal report on the inspection effert
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f UNIT 2 ET AMDATA l l l L____________________________.__________________________.________._____.______________________________________________________ l
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SUMMARY
AMDATA, INC. performed field oddy current imaging of pressurizer h: ster sleeves in Units 1 and 2. Data acquisition took place b: ginning Wednesday, August 30, 1989 and was completed on Thursday, September 7, 1989. A total of 17 sleeves and two I-- nozzles were inspected in the Unit 2 pressurizer. Twelve sleeves representing 104 of.the sleeves were inspected in the Unit 1 pressurizer. The purpose of inspecting Unit 2 was to' determine the reliability This was achieved by of AMDATA's addy current imaging technique. inspecting a population of known leaking sleeves along with a few non-leaking sleeves in the Unit 2 pressurizer. The Unit 2 pressurizer-inspections could then provide a quantitative ovaluation of addy current imaging as applied to pressurizer hcater sleeves. If confidence levels were high enough, then the Unit 1 pressurizer was to be inspected. A preliminary review of Unit 2 data showed very good correlation and,therefore Unit 1 was then inspected. The attached tables show the imaging inspection results. Some of the conclusions that can be drawn include:
- All indications in Unit 2 are axial in nature.-
- There were no indications in Unit 1 except for a very small amplitude signal from sleeve C2 in the weld.
- All Unit 2 indications occurred in the region of the seam.
- None of them exceeded a measured length of 1.5".
- some sleeves showed axial cracks above the weld, but none in or through the weld.
- High frequency (250 KHz) data provides better spacial resolution than at 100 or 65 KHz.
A formal report on the inspection effort is forthcoming.
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A l, INTRASPECT/PC ULTRASONIC IMAGING SYSTEM i
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l ULTRASONIC EXAMINATION T PRESSURIZER VESSEL HEATER SLEEVE-TO-ID CLADDING SEAL WELDS AT BALTIMORE GAS AND ELECTRIC COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT UNIT #2 AMDATA, INC. 1000 DAY HILL ROAD WINDSOR, CT 06095 l
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(, INTRASPECT/PC ULTRASONIC IMAGING SYSTEM i-ULTRASONIC EXAMINATION
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,: HEATER SLEEVE-TO-ID CLADDING SEAL WELDS AT BALTIMORE GAS & ELECTRIC COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT #2 REPORT NUMBER: IR-AMD-025 PREPARED BY: .
- DATE // MM u ON
- LETVEL III REVIEWED BY: 2 '
MM[ DATE ' [ /f[/ LYVEL I / ). REVIEWED BY: QA ' leen.
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DATE f
- d. Of I APPROVED BY: -
P ' DATE S'M 7, / M7 j E PPlSIDENT/ v / NDE ENGINEERING SERVICES I L u } ..
TABLE OF CONTENTS EECTION DESCRIPTION OF TEXT I. INTRODUCTION II. PROJECT BACKGROUND INFORMATION III. EXAMINATION EQUIPMENT AND TECHNIQUES IV. DATA ANALYSIS CONCLUSIONS V. DATA DISPLAY PRINTOUTS VI. PROCEDURE VII. PERSONNEL CERTIFICATIONS VIII. TRANSDUCER CERTIFICATIONS {-
c i I. INTRODUCTION AMDATA, INC., a wholly-owned subsidiary of_ Combustion [ Engineering,' deployed a field examination team equipped with the IntraSpect/PC Ultrasonic Imaging System to the Baltimore' i j Gas & Electric Company's Calvert Cliffs Nuclear Power Station, Unit #2. The objective of this operation was to ultrasonically examine Heater Sleeve-To-ID Clad Seal Welds on the Pressurizer Vessel. The ultrasonic data acquitjtion was . performed on August 6 and 7, 1989. A total of seven {' sleeve / weld areas were examined. l II. PROJECT BACKGROUND INFORMATION The Inspection staff of-Baltimore Gas &-Electric Company at Calvert Cliffs had been aware that leakage existed at the pressurizer vessel heater penetration sleeve-to-ID cladding seal welds. ' Unknown to them, however, was whether an ultrasonic examination technique could be applied to } accurately and confidently detect and locate the flaws responsible for the leakage. III. EXAMINATION EOUIPMENT AND TECHNIOUE The primary data acquisition and analysis system for this effort was the IntraSpect/PC Ultrasonic Imaging System. This system is comprised of a single portable module which contains all ultrasonic acquisition and digitization hardware, along with data processing capability onboard. Data is transferred from the unit's hard disk drive to-5.25 inch floppy disks for archival and subsequent analysis. l The scanner mechanism was designed to attach directly to the length of the heater sleeve which extends below-the vessel bottom head. The search unit holder, which was machined on site, inserts into the heater sleeve and is positioned to begin scanning at the top edge of the sleeve which penetrates the vesgel. The search unit probe was then The rotated a full 360 (plus 0.1 inch to provide overlap). i search unit was pulsed at 0.075 inch intervals along each circumferential scan. Following each circumferential scan, l' the, search unit was indexed axially (down the sleeve) a l distance'of 0.05 inch, and another (opposite direction) circumferential scan performed. The scanning motion of the search unit was manually driven, utilizing geared hand l cranks. The search unit employed during these examinations was a 0.25 inch diameter, 5.0 MHz, dual element 0 longitudinal wave panametrics model. The rationale for selection of such a technique was two-fold. First, time constraints imposed to perform the examination did not permit technique development to employ other wave modes / angles of refraction. Second, the data which would be acquired from these exams t-
10 - p was considered to be meaningful, but-with limitations. These limitations are imposed by the lack of complimenting data which could;have been acquired by injecting ultrasound
'into the component at. varying directions and/or angles, thereby increasing detection capability. Further technique' development'is clearly warranted to optimize the value of future ultrasonic examinations.
IV. DATA ANALYSIS CONCLUSION 3 Based upon thorough' analysis of the data, it is:not possible to positively identify flawed areas of the seven heater sleeve / weld areas examined. However, as previously reported
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to site personnel, areas of interest do exist. In order to present clearly outlined ~ illustrations of the. areas'of interest, data printouts are provided with captions describing.the conclusions of the data analyst. ( .- i j .' I t l
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I/PC ULTRASONIC INSPECTION SYSTEM EXAMINATION
SUMMARY
2alibration Data PKG NO. N/A CLIENT: n is-vre Gas & Eletric C"=r="Y
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1 1 i : ' Seal Weld UT Data Disk No.: i I
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ANALYSIS RESULTS SCAN NO.: FORM ID FINDINGS COMMENTS O' Longitudinal SETB-l' Small,isolatedreflectorlocatch Probable welding defect. 9 X-1.44 Y=0.12 in weld area. N N N
'N N N DESCRIPTION: Ultrasonic ----iwrirm of the seal wid between the ID c1=6+4r= and irrrmal sleeve of hester i a 1 iirma of the Prs ==rr4 w r v== w1 (ff eww4hrHnal wve air ==ir== Hem fmn the ID of the elaave I with m wel troiettal tr=M the G)- Ms=n wrvd Hvity enlitrarirm unn rMrwwd em tb irrHvirktal l al_- .- boire a -4 rurt as to nrrrhre a TIT en irrn ysti 77-. . : fmn tM c1=ue m arrface_ i l
REMARKS: See attached data diMolav l AUTliORIZEb INSPECTOR: N/A ANALYST: Q% Q ')dq4 j LEVEL: E DATE: f/u/77 REVIEWED BY:, p f f 1 1
'Ihe C-Scan shown below depicts the seal weld region (dark color) as a chevron-shaped feature. This low amplitude region results from ultrasound continuing beyond the sleeve ]
into the seal weld, and further on into the ID cladding. Outside of the welded zone, higher amplitude responses are received from the sleeve backwall. In this case, ultrasound inserted at the sleeve ID is returned to the search unit after reflecting from the sleeve OD surface. Note the low-to-mid amplitude response located within the welded region, which is also depicted in the B-scan 12aage. This reflector is resident near the interface of the sleeve OD and the weld metal. The A-scan illustrates the waveform received from the lower-level weld region response to the left of the higher amplitude (red pixel) response. OS/11/89 9") : 1r SETB-1. % F.ress.ua*1 . . _ . - map : 5,1eewCB.. S-1T... _2,4..+.%-C.C")*... ' ., ..W"?.- - , . . , .?. .1.W"' "M,.%_. . . ..., .
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i I/PC ULTRASO!!IC INSPECTION SYSTEM Calibration Data EXAMINATION
SUMMARY
PKG NO. N/A CLIENT: n, igm % g ime,.ic Cm SITE talvert Cliffs Uni.c #2 EXAM AREA SKETCH WELD NO.: r-. . .unn C-1 ID C1=rw r - - j- '
- Ref Dwg No.: % .a, rch at inft.
1.
' Seal Weld UT Data Disk No.: 1 Operator 3. nm,4 n Level m i' I ip Operator C. laSoya Level
- . IL II 4 4l lk k fl l Carbon Steel Bottom Head ANALYSIS RESULTS FORM ID FINDINGS COMMENTS SCAN NO.:
l Low amplitide response from OD Refer to C-scan data display' 0 longitudinal SETC-1 of heater sleeve. for possile causes.
~N N
N A 1 DESCRIPTION: Ultrasome exaurination of the seal wald bet ===n the ID c1=rWr= and inconel sleeve of 0%=ie,wH =1 m a-==i=H r= Emn the ID of the sleeve hanter -s irwm of the ramM wr ww1. I with wnmri troi&ted t<=r.ti the W. 9 vers =n wrmiHviev calibrmH rm == rw-frw-ri cm eb irrMv4 rhin 1 i s h = wirm m _ : =,1 as t o m . t ro n qat e n t oni pm .~ . . _ Sm. t w cl a u. m <aw-face . ! I REMARKS: See attached data display. l l AUTHORIZED INSPECTOR: DATE: N/A N/A ANALYST: 4"Q gh, LEVEL: gr DATE: p/g/f7 REVIEWED 'BY: , LEVEL: --- DATE: gfpf
/
l L _ ____
i l l
/
The C-scan below shows a large, irregular shaped low amplitude weld region. The sleeve below the weld (particularly on the left side) exhibits a marked reduction in OD backwall signal response. The reason for this is not positively known. Possible explanations include:
- 1) Irregular sleeve shape prevents adequate search unit contact in that section of the sleeve.
- 2) Water is trapped (after leaking through the seal weld) between the sleeve and the bottom head.
- 3) Tight sleeve-to-head contact permits sound to be transmitted into the bottom head, absorbing energy which is not returned to the search unit.
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IntraSpect/PC .
- Copyright CCF-1989CAe n taf.Ido G.f I
1 l- - -- -- _.- - _ ~
7 I/PC ULTRASONIC INSPECTION SYSTEM Calibration Data EXAMINATION
SUMMARY
PKG NO. N/A l CLIENT: mg % g mac c SITE talvert Cliffs Unit #2 EXAM AREA SKETCH WELD NO.: Penetration D-1 In c1 =,4r+4 n,_ ai 8 rr- Ref Dwg No.: %. h rch at 1 fe. I I ISeal Weld UT Data Di::k No. : 2 f a l I I
~
Operator _f n,-4.n Operator c.14sora Level Level III II e 7. 1
;-Irrnnp1 Sleeve Carbon Steel Bottre liaisd I,i .t ANALYSIS RESULTS FORM ID FINDINGS COMMENTS SCAN NO.:
O' Longitudinal SETD-1 No apparent indications Sleeve seal weld has no apparent abnormalities. N N I N w
'N DESCRIPTION: h -.ic ,==rin Hon of the -1 s=1d between the ID c1=dr+ir=_ ard inconel sleeve of d r ,r m__ ._:inna of the Pi- ,ri wr w =-1 0*Tnarit,=+in=1 1.arve -n=Hru Gm the ID af the slaave t with er==wi mo%cted tra.=rrti the CD. S'wnesen 1Hvf tv calikmHrm s.ama ru=rfnrund nn the inrtivirksal !
I el_r;- hs i r= - ' nswi as to t= . - rp' n QiE rn 1(lfE M 7-~ - _- fyrun the elmWUP (E CEfff 2co - I REMARKS: See attached data displays. I 1 l AUTHORIZED INSPECTOR: N/A DATE: N/A l I ANALYST: [ Q(g,, LEVEL: g DATE: y/a/p7 REVIEWED BY: [ Q/ LEVEL: [ DATE: ;ykg'
/
l
The C-scan shown below represents what is considered to be a typical response pattern from an unflawed sleeve weld. This is based upon the symetrical and uniform shape of a the seal weld and a relatively consistent backwall nsponse.
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Intr 4Spect/PC . f I
i I/PC ULTRASONIC INSPECTION SYSTEM l EXAMINATION
SUMMARY
Calibration Data [ PKG NO. N/A I CLIENT: m3g, % g p,, -Mc r w SITE talvert Cliffs thrit #2 EXAM AREA SKETCH WELD NO.: P.,-;.
;;- F-1 i
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! I I' Seal Weld UT Data Disk No.: 2 ~ I S ' I Operator 3. % Level m Leve1
^
U l !!_._ Operator c. Lasora II
. 7i N l h -Inconel Sleeve Carbon Steel Bottan Head '-
ANALYSIS RESULTS SCAN NO.: FORM ID FINDINGS COMMENTS fNoapparent indications Sleeve seal veld has no O' Longitudinal L SETF-1 annarent abnormalities. - N ~ 1N N, . w I N x DESCRIPTION: I i Ultrnamic exaurination of the seal weld berween the ID c1=4+1ne arri incomel sleeve of heater --% i t ma of the Pre ==M wr m1. 0*TnwitsrHm1 wave a-win =Hm fmn the ID of the =1aave - with ar=wri nruktsi tr=-rti the T. Simr= ameirivity en14hrnH m u== mrfrw==4 m tw inr+1vi+=1 i i
=1- .- ww w w.i as to nmehr o a gar en imt FSH i.~.- fmn tw cinavn m enn-face _
i REMARKS: See attached data display. AUTHORIZED INSPECTOR: N/A DATE: N/A
/ A ' < LEVEL: ~ -m DATE: y/,, , '~M' ANALYST
- 9 H m w AdcG n REVIEWED BY: ff LEVEL: g DATE: a/jf I,
,/
m
The C-scr.n given below is representative of the responses which were imaged from a nomal, unflawed sleeve weld. Note the uniform shape of the low amplitude weld region, along with a reasonably consistent sleeve backwall response. l 98/1 E/S 9 : 12J_3 9 . 5.ET F..- 1. . . ? P. a.ne s s.u.m.a i_s._e a.CE E e,wC-.WF,.. 2. .J.1..'I. a_. ._'.'!L'_J.A.,. .,.',~_.'c.m._. '_'_;_~ 'Z.C. "~~~., '4.. C,'_' ". _...._m.._.._...._.,_.,._
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-In tviSpec t /PC. -
i I/PC ULTRASONIC INSPECTION SYSTEM EXAMINATION
SUMMARY
Calibration Data PKG NO. N/A CLIENT: a,,gy g g m c% SITE talvert Cliffs Uni.t #2 EXAM AREA SKETCH WELD NO.: Penetration H-1 ID c1=rW rw--- irr Ref Dwg No.: %, ,a.rch at im, f' UT Data Disk No.: fSealWeld 3
'I ill Operator i% ~
Level ni __,b i L__ Operator C. LaSoya Leve1 II ! . .I n l l lI ; "IDCencl SlecVC l Carban Steel Bottom Head ANALYSIS RESULTS l l. SCAN NO.: TORM ID FINDINGS l COMMENTS s no O' Longitudinal SETH-1 No apparent indications {eeQsea e] L _N ) N N Ni t DESCRIPTION: Ultrnamic a==riration of the seal w_1d between tie ID clar= and trecmel sleeve of heater --; : irm of the Pr==rH e maal - 0*1mrit'r+inal wave Wr=e fmm the ID of the sleeve i 1
%=raen w rivity c=14hr= rim uma rw rfrinwri m tb # rrH d rhm1 with ar==vi troiccted renared the CD.
C.- wir, s nart as to rev,+,c, a gar en 1rm voi n.~.._ fm. the ci- m arrface. I i REMARKS: See attached data display. l l l AUTHORIZED INSPECTOR: N/A DATE: N/A ANALYST: Q 4 LEVEL: g DATE: f/u/f9 REVIEWED BY: h [. W LEVEL: ,g DATE: jp/l/f/
/
L-
)
l 1 i l l The C-scan presented below is indicative of the responses which are expected to be imaged from an intact sleeve-to-cladding seal weld. I J r i c .. _ . ._ c . 2 _._x..
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$ i I/PC ULTRASONIC INSPECTION SYSTEM EXAMINATION
SUMMARY
Calibration Data PKG NO. N/A CLIENT: a,3g ,%3 m % SITEtalwrt Cliffs Unit #2 EXAM AREA SKETCH WELD NO.: Penetratim K-1 ID c1 =r6+i'= -- _j ' ' Fr Ref Dwg No.: % , ok.ers at 1.ft. I I f' Seal Wald UT Data Disk No.: 3 l lIl Operator 3_ m.6,n Level TTT _ _j I lE_. Operator C. LaSoya Level II e 4 1 Il ! l l, l -Inconel Sleeve l' Carton Steel Botton ilead ANALYSIS RESULTS SCAN NO.: FORM ID FINDINGS COMMENTS O' Lonsitudina SETK-1 No apparent indications na nt bn r 1 e TN A : N DESCRIPTION: Ultrasarde examinatim of the seal weld between the ID c1=++i- and inconel sleeve of heater -s ; rum of the Pr==<=rH wr mi - 0*1meit,=+ir=1 unve oe- i=H m fmn the ID of the ala=ve I with ====i t roiected tr-ti the m. s'ver- =wH eivirv en11hrmH em == mrfnr-,4 cm the ir=+1virh=1 i sleeve heirw p-==itwet as to urvrbre a 001 en inni Pql 3 sm..s fyr=n rhn <t1 wup (Y) ==rrface - I _ l REMARKS: See attached data display. i AUTHORIZED INSPECTOR: N/A DATE: N/A ANALYST: , Q 4 LEVEL: g DATE: y/a/fg REVIEWED 53Y:
'Mjfj LEVEL: W ,
DATE: 9gg
The C-scan pictured below is indicative of the responses expected from an intact sleeve-to-scal weld condition. f 1 i i
. ~ . . .
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l I/PC ULTRASONIC INSPECTION SYSTEM EXAMINATION
SUMMARY
Calibration Data PKG NO. N/A CLIENT: n,3,.4% % & m rm SITE talvert Cliffs thxtt #2 EXAM AREA SKETCH WELD NO.: r - ouan H-3 ID C1=+H =-' a' i & Ref Dwg No.: u. =h.ers nr inge.
- 8 I DSeal Wald UT Data Disk No.: a b' I Operator .1 w i n Level
{ III 1 Operator C. IaSova Level II l e il I, _ i ll CWn Steel Bottam Head ' l~lDConelSleeve ANALYSIS RESULTS j SCAN NO.: FORM ID l FINDINGS COMMENTS 0* Longitudinal SETH-3 Area y
,,interes ,0 X= 1.9" to 2 65" Possible Crack i
I I Same as above Possible crack 0* Longitudinal SETH-3A XA X 1 ~ N i DESCRIPTION: I Ultrasonic exuaination of the seal weld between the ID c1=4+i- and irronel sleeve of ! heater -- " or in- of the wrriwr 1. 0*Tr--its N-1 wave --- in=rinn fmn the ID of the =1aave i with -==4 arnieeted tw the CD. e,veam -mi tivity enlik = rim ma n-rfnmari - the iv=+tv4 A=1 i sleeve beim aw--inari as to nrvviiv-p n QCE rn Inn'f Pql -.-.n .s. fmn rho elapup (Y) areface. I i REMARKS: See two attached data displays. _,_ i I AUTHORIZED INSPECTOR: N/A DATE: N/A l LEVEL: g ANALYST: ~
/( Q , DATE: f/ffff9 REVIEWED BY: j p LEVEL: ( DATE: p l l
l _ _
The C-scan offered below may be indicative of a defective seal weld condition. The very wide weld region, along with the medium amplitude indications highlighted below are different from those encountered during other heater sleeve examinations performed on site. l
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UllIT 1 REMOVED HTRS. PT EXAM l l
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. No. t T-/C-d//
NONDESTRUCTIVE TESTlHG REPORT M.R.No. ?- ~
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