IR 05000329/1980018
| ML19330B085 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 06/24/1980 |
| From: | Cook R, Knop R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19330B083 | List: |
| References | |
| 50-329-80-18, 50-330-80-19, NUDOCS 8007300304 | |
| Download: ML19330B085 (7) | |
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U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Reports No. 50-329/80-18; 50-330/80-19 Docket Nos. 50-329; 50-330 Licenses No. CPPR-81; CPPR-82 Licensee: Consumers Power Company 1945 West Parnall Road Jackson, MI 49201 Facility Name: Midland Nuclear Power Plants, Units 1 and 2 Inspection At: Midland Site, Midland, MI Inspection Conducted: May 1-31, 1980 AhD
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xen Inspector: R '.
ook 8pDy//JW
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i R. C.h26 N
(/)(/!g6 Knop, Chie Approved By:
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Projects Section 1 Inspection Summary Inspection on May 1-31, 1980 (Reports No. 50-329/80-18; 50-330/80-19)
Areas Inspecte_d: Examination of site conditions:
questionable information pertaining to the licensee response to IE Bulletin No. 79-02; suspect pipe whip restraint bolting; investigation into construction activities of The Zack Co.; NRC/ Licensee Management meeting at the Regional Offices; deten-sioning of reactor vessel holddown bolts; investigations into container marked " radioactive material" retained on site; audit of Peabody Testing by NRC; and installation of Class IE electrical conduit clamps. This inspection effort involved a total of 71, inspection hours by one NRC Inspector.
Results: No items of noncompliance or deviations were identified.
80078003o1
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o DETAILS
Persons Contacted Consumers Power Company Personnel D. Miller, Site Manager T. Cooic, Project Superintendent
- T. Spelman, Senior Engineer M. DeWitt, QA Mechanical H. Allen, QA Mechanical J. Zimmerman, QA Mechanical Bechtel Power Corporation Personnel L. Dreisbach, Project QA Engineer
- R. Shops, QC Supervisor Peabody Testing R. Sweet, Project Manager B. Maycheck, Supervisor Bay County Sheriff's Department J. Woods, Detective Numerous other principal staff and personnel were contacted during the reporting period.
- Denotes those present during the exit interview conducted during the reporting period.
Functional or Program Areas Inspected 1.
Site Tours At periodic intervals during the report period, tours of selected areas of the site were performed. These tours were inter.ded to assess the cleanliness of the~ site; storage conditions of equipment and piping being used in site construction; the potential for fire or other hazards which might have a deleterious effect on personnel and equipment and to witness construction activities in progress.
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2.
Concrete Expansion Anchors During the report period, the Resident Inspector was informed that the licensee responses to IE Bulletin No. 79-02 may contain some queetionable information with regard to the actual degree of compliance with the intent of the bulletin. This bulletin pertains to pipe support base plate designs using concrete expansion anchor bolts. The questionable information is based on establishing whether tests performed were actually conducted in a manner compatible with the assumtions used in engineering evaluations and whether the numbers of tests for the expansion anchors were adequate for an engineering evaluation. The results of the engineering evaluations are contained in the licensee response to the bulletin.
Bechtel Power Corp. is performing a manage-ment audit, and licensee investigations are being conducted to determine the actions necessary to provide corrected responses in IE Bulletin 79-02.
3.
Suspect Restraint Dolting Material During the report period, the Resident Inspector was notified that material property test performed on bolting in accordance with AISC requirments had yielded unsatisfactory results. The questionable bolting material is used primarily for assembly of large pipe whip restraints. The tests performed required testing three bolts of a given lot.
' One lot tested was for 1 1/8" x 6 1/4" bolts made from A-540 material.
All three bolts failed the pull test requirements at<b.45 ksi.
An acceptable pull test is 2:77 ksi.
Another lot tested was for 1 1/4" x 4 1/2" bolts made from A-490 material. Two of the three bolts tested failed the pull test require-ments at 50 ksi. An acceptable pull test is5:102 ksi.
All the bolts failing the pull tests were supplied by the same manu-facturer. However, this manufacturer has supplied bolting of a same material specification as that referenced above which did yield acceptable properties. The acceptable material was procurred under a different order. All bolting material which failed exhibited ductile failure. The licensee has identified 186 bolts of questionable material. The 1 1/8" diameter bolts were made from heat no. 115261 and 64 bolts of this material were sapplied to the site. The 1 1/4" diameter bolts were made from heat no. 69784 and 122 bolts of this material were supplied to the site. Twenty nine pipe whip restraints located in containments for Units 1 and 2 use bolts of the same size as
.those made from the questionable material. However, the exact location
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of each bolt of questionable material has not yet been established.
A total of approximately 844 bolts of these sizes is required to assemble the 29 pipe whip restraints. This item is identified on Bechtel Nonconformance Report No. 2988.
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The licensee has determined (at this time) that the items are not reportable under the provisions of 10 CFR 50.55(c).
4.
Investigation Construction Activities Pertaining to Installation of Hearing, Ventilating and Air Conditioning (HVAC) Systems During the reporting period, the Resident Inspector reviewed the licensee efforts to quantify the results of overinspections performed by Bechtel Power Corp. of the reinspections performed by Zack Co.
The licensee has performed overinspections in the two areas which had been identified by The Zack Co. as being completed and performed a detailed inspection of five hangers which had completed resinspections.
The licensee identified six discrepancies which existed on four of the five hangers and had not been explicitly identified during the resinspection. The licensee completely agreed with the inspection results for one of the hangers.
A total of approximately 75 welds were overinspected by Consumers Power Co.
Each hanger has 5 to 20 welds per hanger.
Some of the discrepancies identified by the licensee which were not identified by The Zack Co.
could have been indications which were masked by paint. The licensee is presently resolving these issues with Bechtel Power Corp. QC and The Zack Co.
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The licensee informed the Resident Inspector that the situations which exist pertaining to the discrepancies noted during the investigation of The Zack Co. was not reportable under the provisions of 10 CFR 50.55(e).
The licensee stated that it had been determined that the nonconforming conditions which had been identified (at this time) would not adversely affect the safety of the plant.
5.
Management Meeting on May 2, 1980, the Resident Inspector attended a meeting with other regional personnel and management representatives from Consumers Power Company, Bechtel Power Corp. and The Zack Co. at the NRC Regional Offices located in Glen Ellyn, Illinois. Discussions were conducted pertaining to failed reactor vessel holddown anchor bolts and NRC findings pertaining to investigations of construction activities for installation of heating, ventilating, and air conditioning systems.
Excerpts from these discussions are contained in NRC Inspection Report No. 50-329/80-14; 50-330/80-15.
6.
Detensioning of Reactor Vessel Holddown Bolts During the reporting period, the Resident Inspector examined licensee efforts at detensioning reactor vessel holddown bolts in Unit 1.
Thirty eight bolts wer detensioned through the first of three passes during May 1980. Lift off hydraulic pressures ranged between 6000 psi and 13,500 psi with one at 14,000 psi. The procedure limited " lift off" to 13,700 psi. A Consumers Power Co. Nonconformance Report No. NCR - 044 was generated to address this over pressure " lift off" condition. The-4 -
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tensioner used in this detensioning process has a hydraulic cylinder area of 27.134 sq. in.
During the reporting period, the Resident Inspector attempted to establish the adequacy of the bond breaker between the holddown bolts and the surrounding concrete. Reviews of documents and photographs could not explicitly establish the condition and adequacy of the band breaker.
7.
Container Marked Radioactive Material During the reporting period, the Resident Inspector was notified by the Regional Office that Peabody Testing, located at the Midland site, had retained a container marked "Ceution, Radioactive Material" which may contain radioactive Xe-133 gas.
The Resident Inspector investigated this matter and found that the Bay County Sheriff's Dept. had procured a container with radiation markings and had solicited the help of Peabody Testing to check the container for radioactivity and information.
The Bay County Sheriff's Office brough the cylinder to the site for further examination by Peabody Testing. Peabody Testing monitored the container and established that the radiation was low level or nonexistent.
Because of the late night hour, it was decided to retain the container in the " vault" with the Peabody radiographic sources for " safe keeping" until proper disposal could be affected. The container was monitored by Consumers Power Co. using low level detector. No radiation or contamination could be detected. The container was returned to the Bay County Sheriff's Dept. for further evaluation and examination. The Bay County Sheriff's Dept. determined that the container was completely empty.
At the request of the Bay County Sheriff's Dept. and the Michigan Dept.
of Public Health, the Resident Inspector procurred the container from the Bay County Sheriff's Dept., located at Bay City, Michigan. The container was subsequently turned over to a Regional Inspector from the Fuel Facility and Materials Safety Branch for delivery and disposal by the Regional Office.
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Fuel Facility and Material Safety (FF&MS) Branch Audit of Peabody Testing During the reporting period, the Resident Inspector accompanied i FF&MS Branch Regional Inspector during portions of an audit and observation of the safety practices used by radiographers of Peabody Testing. The Resident Inspector observed radiographic safety techniques at the 634 foot elevation of the turbine building and at the 601 foot elevation of an auxiliary building wing wall. No discrepancies were noted by either inspector.
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Class IE Electrical Conduit Clamp Installation During the reporting period, the Resident Inspector reviewed the licensee techniques for installation df Class IE conduit clamps.
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Class IE Conduit Supports Specification and Installation E-42(Q)
states, " Bolts in pipe clamps of rigid steel conduit shall be tightened a minimum of two complete turns past hand tight".
This requirements did not appear readily inspectable by rigorous quality control. A review of the Quality Control Instruction No. E-1.0 revealed some ambiguity in dertermining the degree of tightness for conduit pipe clamps. Evaluations into the established quality control criteria and measurability of these criteria has carried into the next subsequent reporting period.
Exit Interview The Resident Inspector met with licensee representatives (denoted under Persons Contacted) on May 29, 1980. The inspector summarized the scope and findings of the inr.pection effort to date. The licensee acknowleged the findings reported herein.
Attachment: Preliminary Inspection Findings-6 -
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