IR 05000237/1981012
| ML17193B468 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/05/1981 |
| From: | Danielson D, Key W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML17193B467 | List: |
| References | |
| 50-237-81-12, IEB-79-03A, IEB-79-3A, IEB-80-08, IEB-80-8, NUDOCS 8106120145 | |
| Download: ML17193B468 (6) | |
Text
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-237/81-12 Docket No. 50-237 Licensee:
Commonwealth Edison Company Post Office Box 767 Chicago, IL 60690 Facility Name:
Dresden Station, Unit 2 Inspection At:
Dresden Site, Morris, !llinois Inspection Conducted:
April 9-10, 1981 InspectorfW.~~
Approved By:
D. H. Danielson, Chief Materials and Processes Section Inspection Summary License No. DPR-19 Inspection on April 9 and 10, 1981 (Report No. 50-237/81-12)
Areas Inspected:
Review of specifications and procedures, observation of modification activities, and review of modification documentation related to Mark 1 Torus Internal Modifications; review of IEB 79-03A and IEB 80-08 action The inspection involved 15 inspector-hours onsite by one NRC inspecto Results:
No items of noncompliance or deviations were identified.
s1oa120/tfS
DETAILS
- Persons Contacted Commonwealth Edison Company (CECo)
- D. J. Scott, StatiQn Superintendent
- R. Ragan, Assistant Station Superintendent D. Wheeler, Station Construction Engineer
- J. D. Brunner, Station Technical Staff Supervisor T. Kroll, Station Construction Engineer R. Gardner, Quality Control Enginee *E. F. Wilmere, Quality Assurance. Supervisor
- R. W. Stobert, Quality Assurance Inspector
- E.. Budzichowski, Station Operations
- D. Farrow, Station Administration
- J. E. Enigenburg, Station Maintenance
- M. Dillon, Station Operations D. Schildgen, Quality Control Engineer Phillips Getshaw C. Rachke, Quality Control Supervisor D. Breuer, Qu~lity Control Inspector
- Denotes those present at the exit intervie Licensee Action on IE Bulletins IE Bulletin No. 80-08, Examination of Containment Liner Penetration Welds, Item 1, required licensees to determine whether their facility contained flued bead designs as illustrated in Figure NE 1120-1 Winter 1975. addenda to the 1974 and later editions of.the ASME B&PV Cod The bulletin further required the licensee to determine the type of weld joint, type of nonde-structive examinations performed during construction and result On August 15, 1980, the licensee informed th~ Region office, that a review of construction records for Dresden Station, Units 2 &.3, indicated that flued head penetrations were ~sed, and all welds required radiographic examination and a s*urface examination (MT or PT) and that no record of Ultrasonic examination in place of radiographic examination was foun On April 9, 1981, the NRC inspector reviewed the following construction radiographs of containment penetration welds and determined that no backing rings were use Part No. 2-X105B-36, Weld No. 2 Part No. 2-X107B-34, Weld No. 2 Part No. 2-X149A-26, Weld No. 2 Part No. 2-X130-6, Weld No. 2 Part No.. 2-X144-26, Weld No. 2 Part No. 3-X113-24, Weld No. 2 Part No. 3-X107B-34, Weld No. 2
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Part No. 3-Xl05B-36, Weld No. 2 Part No. 3-Xl07A-34, Weld No. 2 Part No. 2-Xll3-24, Weld No. 2 This bulletin is considered close IE Bulletin 79-03A, Longitudinal Weld Defects in SA-312 Type 304 Stainless Steel Pip Item 1, required the-licensee to determine whether ASHE SA-312, Type 304 stainless or other welded (without filler metal) pipe was in use or planned for use in safety related systems of their facilit On April 12, 1979, the licensee reported to the Region III office, that a review of the design specifications and piping design tables for original construction and modifications indicated that for smaller pipe sizes (less than 14 inches)
ASHE SA-312 was us~d; however, the larger sizes were ASHE SA-358 electric-fusion-welded pipe, and concluded that ASHE SA-312 stainless steel pipe welded without filler metal is not present in the safety related systems of Dresden Units 1, 2, and The inspector reviewed the licensee's records and considers appropriate corrective actions were take This Bulletin is considered close Functional or Program* Areas Examined Specification Review The following specifications for torus internal modification were reviewed for conformance to NRC, ASHE Code, and AWS requirement Sargent and Lundey (S&L) Specification K-4052 Torus Internal Modification - Units 2 and Nutech Repair Program COM-19-054 for SRV in Plant Test Instrumentation Modificatio Nutech - Com-19-003, Revision p, In-Plant SRV Discharge Test, Dresden NPS, Unit The following work is being performed in accordance with Nutech drawings and S&L specifications on work request No. 4581, under the control of CECo Station Constructio Modification - LPCI Full Flow test line into suppression chambe Nutech Drawing 64.313.080 Purpos To create a mixing action in the primary containment suppression pool to prevent impingement on the internal catwal Modification - Welding Brackets to each of the 16 existing U-shaped LPCI/CC spray header support Purpos To increase the capac1ty of LPCI/CC spray headers to resist postulated upward loads due to LOCA pool swell froth impingmen i
- Modification - Mounting thermowell through the Suppression chamber shell, in each of the 16 mitered bays located in the bottom half of the chambe Purpos To house temperature sensors to monitor Suppression pool temperatur Modification - Weld two (2) stiffener plates to the outside of each of 48 downcomer plates and to the bottom dead center region of the vent header Purpos To increase the capacity of the downcomer vent head inter-section to resist postulated loads due to steam condensation and SRV valve discharg Modification - Installation of vent header deflector beneath the existing vent_heade Purpos To resist postulated pool swell loads, while reducing pool swell loads on the existing vent header Modification - Replacement of existing supports for catwalk inside suppression chambe Purpos To give supports higher capacity to resist postulated loads due to pool swell, steam condensation, and SRV discharg Modification - Install instrumentation on suppression chamber torus supports, piping attached to torus, and on SRV discharge line support Purpos To obtain structural response data during actuation of an SR CECo Surveillance Procedure No. DOS-250-5 automatic blow down system at low pressure and rated pressur Purpos To detail steps to be followed to safely and effectively test the automatic blow down syste.
Drawing Review The following drawings of torus modifications were reviewed during the inspectio Drawing No. 64.313.0315 - Downcomer Lateral Bracing Installation and Fabrication Detail Drawing No. 64.313.0507 - Downcomer Vent Header Stiffener Installation and Fabrication Detail Drawing No. 64.313.0802 - LPCl Full Flow Test Line Suppression Chamber Klbow and Internal Support Fabrication and Installation Detail A design change to this drawing by Nutech deleted the LPCI suppor During the exit, the inspector voiced concern that with 5350 GPM at 350 psi and 26 fps the stresses at the chamber penetration would be such that a possibility exists for this line to break at the penetra-tio The licensee stated they they would pursue this concern furthe This is an unresolved ite (237/81-12-01)
Drawing No. 64.313.0803 - HPCI Turbine Pot Drain Line Suppression Chamber Internal Support Fabrication and Installatio **
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Drawing No. 64.313.8085 - Spray Header Suppression Chamber Internals Support Fabrication and Installatio Drawing No. 64.301.0105 - Vent Header Deflecto Drawing No. 64313.0809 - HPP Exhaust Vacuum Breaker Suppression Chamber Internal Support Fabrication and Installatio No items of noncompliance or deviations were identifie.
Observation of Activities 4-The inspector examined finished work and ongoing activities in the toru The finished weld on one (1) LPCI full flow test line, welding of deflectors welds of the downcomer, supports, and catwalk reinforce-ments were examine The inspector witnessed partial fit-up of the second LPCI full flow test lin No items of noncompliance or deviations were identifie Documentation Review The following weld data sheets generated by the Phillips Getschow Company, of torus modification work were reviewe Relief Valve Discharge Pipe
- Welding Procedure, Ma-11-0-5, Revision 5 Drawing No. B-1372-2-AA-Bay-1 Field weld No. 1 and SRV Temporary Attachments Drawing No. B-1372-2-BB Field weld No. TA-4 and 15 Relief Valve Discharge Pipe Drawing No. B-1371-1-AA-Bay-1 Field weld No. 10 SRV Piping Vacuum Braker Drawing No. M-1045-Line No. 2-3019A/2-30 Field weld No. 2 Line No 2-3019-B, Weld No. 1 and 3 Line No. 2-3019-.C, Weld No. 1 and 2 Downcomer Vent Header Stiffeners Drawing No. B-0507-2-AA-Bay-3 Weld No. 1 and 4 No items of noncompliance or deviations were identifie '
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- Welder Qualification Review Qualification records of the following Phillips Getschow Company personnel were reviewed for conformance to the requirements of ASME Code, Section* I H. A. Arteaga Stamp No. 216 J. Levan Stamp No. 46 J. Thompson Stamp No. 989 L. Blackstrom Stamp No. 992 D. Malloy Stamp No. HH7 D. Caloca Stamp No. PB No items of noncompliance or deviations were identifie Unresolved Items Unresolved items are matters about which more information is required to ascertain whether they are acceptable items, items of noncompliance, or deviation An unresolved item identified during the inspection is dis-cussed in Paragraph Exit Interview The inspector met with licensee personnel (denoted in Persons Contacted) at the conclusion of the inspection on April 10, 198 The item of concern identified in Paragraph 2 was discussed and acknowledged by the license