IR 05000410/1980004
| ML17053B882 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/08/1980 |
| From: | Mcbrearty R, Lester Tripp, Walton G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML17053B881 | List: |
| References | |
| 50-410-80-04, 50-410-80-4, NUDOCS 8009050486 | |
| Download: ML17053B882 (12) | |
Text
Report No.
80-04 U.S.
NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT Region I Docket No.
50-410 License No.
CPPR-112 Priority Licensee:
Niagara Mohawk Power Corporation 300. Erie Boulevard, West Syracuse, New York 13202 Facility Name.
Nine Mile Point Nuclear Station, Unit 2 Inspection at:
Scriba, New York Inspection conducted:
May 12-15, 1980 Inspectors:
f86 7P
'.
A, McBrearty, Reac or Inspector G. A. Walton, Reactor Inspector Category 7 /9'&0 da igned 7 f'PM da e
gned date signed Approved by:
L.
.
ripp, Chief, Engineering Support Section No. 2, RCSES Branch te signed Ins ection Summar
Ins ection on Ma 12-15 1980 Re ort No.-50-410 80-04 Areas Ins ected:
Routine, unannounced inspection of repair activities associated wst t e bio ogtcal shield wall.
The inspection involved 32 inspector-hours onsite by two regional based inspectors.
Results:
No items of noncompliance were identified.
Region I Form 12 (Rev. April 77)
P'
DETAILS 1.
Persons Contacted Nia ara Mohawk -Power Cor oration
- S. Czuba, gA Engineer
- R. Dahlin, Construction Services
- J. L. Dillon, gA Engineer
- L, G. Trenton,
- R. A. Norman,
- R. L. Patch, gA Engineer Stone 8 Webster.
En ineerin Cor oration (SSW
- R. Bernard, Project gA Manager
- C. E. Crocker, Mechanical Engineer
- W. E. Franczek, -Biological Shield Wall Manager
- C. E. Gay, Superintendent, Field gC
- C. A. Goody, Resident Manager C.
E, Hilton, Superintendent of Construction V. Langley, Level III UT Technician (Boston)
M. Mathews, gC Inspector
- M. R. Oleson, Assistant Resident Manager
- M. 0.
Pace, gA Engineer J.
E. Rogers, Chief Office Engineer L. E. Shea, Head, Site Engineering Office
- W. J. Taylor, Field gC
- Denotes those present at the exit interview.
2.
Biolo ical Shield Wall Re air a
~
Record Review The inspector reviewed procedures, mill test reports and other records associated with the biological shield wall plate material.
The review was done to ascertain compliance with the ordering requirements found in specification NMP-2-.S204G.
The. following were included in the inspector's review:
Stone 5 Webster (S8W) specification number NMP-2-S204G, Revision 1.
Cives Corporation shop order number 5850 dated June 12, 1979 for rolled plate number A5683 and number C732 S8W /AIR number N25204G.for shop order number 5850.
Lukens Steel Company procedure A.0021.
Lukens Steel test, report dated 10/27/76 for melt and slab number A5683.
Lukens Steel test report dated 9/28/76 for melt and slab number C7328.
Lukens Steel mill test certificate dated 11/8/76 for melt number A5683.
Lukens Steel mill test certificate dated 10/15/76 for melt number C7328.
The above were considered with respect to ordering requirements, material identity and compliance with applicable NDE requirements.
The inspector found that ASTM537, Class 1 material was ordered.
Ultrasonic examination requirements of ASTM A578 Level 1, including supplementary requirements S3 and S4.,
and one hundred percent scan pattern was specified.
No items of noncompliance were identified.
b.
Nondestructive Examination NDE The licensee has categorized the biological shield wall welds into the following groups:
inner wall to stiffener welds stiffener to stiffener welds cover plate to stiffener welds The inspector reviewed NDE procedures, NOE data sheets and observed NDE in progress to ascertain compliance with the applicable require-ments of the Structural Welding Code AWS Dl. 1-75.
The following were included in the review:
- ~
Stone
& Webster'(S&W) QCI-HQ3-D9.51-04A, "Ultrasonic Examination of Welds on the Biological Shield Wall".
Gives Corp. Ultrasonic Examination Procedure.NDT-UT 76, Revision 1.
Gives, Corp. ultrasonic examination data, sheets for the following welds:
PB 85/C welded to PA 77 PB 77 welded to PA 85/4 PB 85/1..welded to JA/1 PA 79 welded to PM 86/1 S&W ultrasonic examination report dated 5/13/80 for coverplate 18-5, weld D.
S&W ultrasonic examination report. dated 5/13/80 for coverplate 18-14, weld D.
S&W ultrasonic examination report dated 5/14/80 for coverplate 18-107, weld B.
The inspector observed the ultrasonic examination of the defect area of weld D, coverplate 18-5 and coverplate 18-14.
The welds correspond to Gives Corp. welds PF 274 to PA 85/3 and PK 259 to PC 85/1, respectively.
The examinations were done by S&W personnel using a 2.25 MHZ. >" x 4" transducer at an entry angle of 70o and a Krautkramer model USM2 flaw detector.
Calibration for the examination was, done using the 1/16" diameter hole in a steel IIW calibration block in accordance with AWS Dl..l and S&W procedure QCI-HQ3D9.51-04A.
Defects revealed by the examination were attributed to lack of fusion and were judged unacceptable per the acceptance criteria of AWS Dl. 1-75, Section 8.
Prior to shipment from the vendor.'s plant, Cives personnel performed examinations using ultrasonic and magnetic. particle techniques in accordance with the methods delineated in AWS Dl. 1, Section 6.
S&W Engineering Corporation specification no.
NMP-. 2-S204G, Revision
dated 7/14/77 allowed Cives Corp. the option of doing a volumetric examination using radiography or ultrasonics, or surface examination using magnetic particle methods at 1/3, 2/3 and 3/3 weld joint thickness.
Specification S204G required, additionally, that back-gouged weld surfaces be examined with magnetic particle methods, and at all weld joints requiring radiographic or ultrasonic inspection, and where backing strips remain, the weld root be examined with magnetic particle methods.
Gives Corp. elected to perform ultrasonic examination with supplementary magnetic particle examination where require The reviewed records indicate that the required examinations were done and, based on the examination, results, the biological shield wall was considered acceptable by the vendor.
In addition to the above listed data sheets, the. inspector reviewed ultrasonic examination records associated with various welds which were examined on site by S8W NDE personnel.
The inspector found that defect indications ranging from 3." to 48" long. were detected at various depths in the welds. ~"The ultrasonic indications were attributed to lack of fusion, possibly lamellar tearing and cracking.
Metallurgical studies to determine the cause or causes of the defects were not completed at the time of this inspection.
Evaluation criteria was not defined for disposition of ultrasonic indications detected.,by S8W on site examinations.
This item is considered unresolved pending clarification of the criteria to be used for the disposition of ultrasonic indications.
(410/80-04-:Ol)
The examinations by S8W were done after surface.improvement by grinding to enhance transducer/surface contact..
The Gives examinations were done on the original surface with no improvement.
The inspector found no correlation between the Gives and the S8W examination results.
The licensee has determined that the stiffener to stiffener welds are inaccessible to ul.trasonic examination.
The quality of those inaccessible welds will be evaluated based on an analysis using inner wall to stiffener ultrasonic examination data and not based on data obtained from the specific welds.
Disposition of the inaccessible welds ~...
is considered unresolved pending del.lineation of the. evaluation parameters.
constdered in the.disposttion'.and NRC review of the evaluation and disposition..
(41+80-04'-.'02J.
~Weldin The inspector reviewed the following records relative to.the fabrica-tion and repair of the biological shield wall.
The audit was per-formed to ascertain compliance with the Structural Welding Code AWS D1.1.
Gives Cor oration
, Welding Procedure Specification (WPS) 76-40 Flux Core Automatic Welding, Prequalified (B-U4C-GF)
WPS 76-44 Shielded Metal Arc Welding, Prequalified (B-74A)
f
WPS 76-41 Flux Core Automatic Welding; Prequalified (TC-U5-GF)
WPS 77-42 Flux Core Automatic Welding, Prequalified (TC-U5-GF)
WPS 77-40 Flux Core Automatic. Welding, Prequalified (TC-U4d-,GF)
WPS 77-65 Flux Core Automatic,Welding, Qualified with procedure qualification record (PQR) 77-5.
Qualified using a minimum prehead of 250 F.
Chica o Brid e 5 Iron Specification E 70T-1-3899W using FCAW manual.
Qualified with PQ 3899 at 150 F minimum preheat.
Specification E 70T-1-3901W..using FCAW manual.
Specification.E 70T-1-3913W using FCAW manual.
Qualified with P.Q.,3913W at 150o F minimum preheat.
No items of noncompliance were identified.
3.
Unresolved Items Unresolved items are items about which more information is required to ascertain whether they are acceptable items, items of noncompliance or deviations.
Two unresolved items disclosed during this inspection are dis-cussed in paragraph 2b.
4.
Exit Interview The inspectors met with the licensee repi esentatives (denoted in paragraph 1) at the conclusion of the inspection on Hay 14, 1980.
The inspectors summarized the purpose and the scope of. the inspection and the finding N
(