ML20148N536
| ML20148N536 | |
| Person / Time | |
|---|---|
| Site: | Vallecitos File:GEH Hitachi icon.png |
| Issue date: | 10/18/1978 |
| From: | Bishop T, Haist D, Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML20148N513 | List: |
| References | |
| 50-070-78-08, 50-70-78-8, NUDOCS 7811270126 | |
| Download: ML20148N536 (8) | |
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- U. S. NUCLEAR REGULATORY COMMidSION
, OFFICE OF INSPECTION AND ENFORCEMENT REGION V Report No. 50-70/78-08 Docket No. 50-70 License No. TR-1 Safeguards Group Licensee: General Electric Company Vallecitos Nuclear Center Pleasanton, California 94566 Facility Name: General Electric Test Reactor (GETR)
Inspection at: GETR Inspection c A eptember S
26-28, 1978 Inspectors: N.! l 1o hg T. W. Bisho Rdbetor Inspector Date Signed k $[UW. lO ik 16 D. P. Haist, Reactor Inspector Date Signed
- Date Signed Approved By
- / w /0//8/78 R. C. Hay &Ch'ief, Project Section, Reactor Date Signed i Construction and Engineering Support Branch Summary:
Inspection on September 26-28,1978 (Report No. 50-70/78-08) l Areas Inspected: Routine, unannounced inspection by regional based inspectors of modification activities at GETR including review of modification status, inspection of modifications in progress or com-pleted, review of QA records, and followup on previous 1'ispection items.
The modifications inspected were the primary piping seismic restraints and the primary heat exchanger seismic restraints. The inspection involved 39 inspector-hours onsite by two NRC inspectors.
Resul ts : Of the areas inspected, no items of noncompliance or deviations were identified.
7811270 % RV Form 219 (2)
DETAILS
- 1. Individuals Contacted General Electric Company (GE)
- R. W. Darmitzel, Manager, Irradiation Processing
- J. M. Cherb, Manager, Quality Assurance
- D. L. Gilliland, Manager, Reactor Irradiations
- G. D. Hoggatt, Manager, GETR License Renewal
- 0. Graham, Engineer, Quality Assurance
- 0. F. Butzin, Project Leader, Primary Piping Seismic Restraints
- N. F. Fifer, Project Leader, Primary Heat Exchanger Seismic Restraints
- G. K. Kanemoto, Project Leader, Small Piping Seismic Restraints D. Farquarson, Supervisor, Quality Control
- Denotes those present at the exit interview.
- 2. Status of Modification Activities The following modifications were completed as of September 26, 1978:
- a. Capsule cooling system anti-siphon valves i b. Reactor pressure vessel sway braces
- c. Polar crane portion of missile impact system
- d. Fuel pool heat exchanger supports
- 3. Licensee Action on previous Inspection Findings
- a. (Closed)Openitem(50-70/78-04): Welding defects and missing welds were noted by NRC inspectors on the nitrogen sphere supports. These supports had been examined by the GE QC organization without noting the defects or missing welds.
The licensee has corrected the welding deficiencies and re-inspected the nitrogen sphere supports to the revised weld inspection criteria, finding them acceptable. The revised criteria had been previously examined and found satisfactory by NRC inspectors. The supports were inspected by the NRC inspector and were found to be in compliance with the revised criteria. The inspector has no further questions on this item,
- b. (0 pen) Open item (70/78-04/01): The licensee has not com-pleted the inspection of the concrete forms and rebar placement for the fuel flooding system retaining wall.
The licensee is currently performing additional geological investigations which may affect the design of the retaining wall. No further action on this item is planned until com-pletion of the investigations.
- c. (Closed)Openitem(50-70/78-06): Licensee documents did not specify that all threaded fasteners, except high-strength bolts, are to be secured with approved locking devices and that high-strength bolts are to be torqued.
Licensee representatives have developed a locking procedure requiring each threaded fastener to be secured by torquing, installing jam nuts, or staking threads. The procedure was examined and found satisfactory. This item is closed.
- d. (0 pen) Open item (70/78-06/01): Documents reviewed did not require a quality control inspection of completed restraint installations for such items as verification of correct con-figuration, materials, location, and maintenance of specified gaps and clearances.
It was determined that the various Design Basis Specifications (DBS's) require that inspections be performed on each restraint following installation to assure pertinent requirements have
> been satisfied. Two DBS's were examined (primary piping restraints DBS No. 22A9217, Rev. 0; and primary heat exchanger DBS No. 22A9230, Rev.1). The inspector noted that while DBS No. 22A9217 does not specify who will perform the post-installation inspecticn, DBS No. 22A9230 infers the inspection is to be completed by quality assurance. Licensee repre-sentatives stated, however, that the intent is to have all final installations inspected by the cognizant project leaders, and that the misleading wording of the DBS will be corrected accordingly. Documentation of the project leader's inspec-tions will be maintained. Licensee representatives further stated that a final inspection of installed restraints will be performed by EDAC, and other consultants involved, to verify that the assumptions and models used in their analyses are valid. The inspector inquired about the scope and level of detail of EDACs inspection and requested a copy of the inspec-tion plan. Performance and documentation of final inspections of modifications remains open pending clarification of inspecting responsibility in the DBS's and examination of the consultant's inspection plan.
- e. (Closed)Openitem(50-70/78-06): Documents allow drilling of concrete reinforcing steel (rebar) to facilitate the instal-lation of concrete anchors, yet do not require that records be
maintained indicating where rebar was cut and the effect of cutting rebar. Licensee representatives reported that no structural credit is taken for rebar and, therefore, drilling documentation is not required.
The inspector verified that the structural analysis of the concrete roembers does not take any credit for the existence of reinforcing steel as documented in EDAC Report No. EDAC-ll7-217.03. The inspector has no further questions on this item.
- f. (Closed) Open item (50-70/78-06): One swaged fitting on a poison injection system check valve was found leaking and was only finger tight.
Licensee representatives reported that a water head in the poison injection line had prevented a valid snoop (air bubble) test, and that the connections have been secured and a va71d tightness test has now been performed. Operations Request Form No. 201-35 was issued to check the tightness of all new swagelock connections on the poison injection line. This action was completed July 20, 1978. Four swaged connections were examined by the inspector and appeared to be tight. This item is closed, i g. (Closed) Open item (50-70/78-06): Installation Specification 22A9252, Rev. O shows an anchor bolt spacing of 4-1/2" minimum compared to other specifications (e.g., Nos. 22A9243, Rev. O, and 22A9231 Rev.1) which require a minimum spacing of 5-1/4" for the same 3/4" anchor bolts.
Licensee representatives provided vendor data indicating that a bolt spacing of 4-1/4" is satisfactory but reported that this aspect is not significant since actual bolt spacing is 7". The inspector has no further questions on this item.
- h. (Closed) Open item (50-70/78-06): One anchor bolt nut on the pool heat exchanger seismic restraints lacked sufficient thread engagement. The anchor bolt had not been fully torqued.
The inspect'or verified sufficient thread engagement and evidence of torquing. This item is closed.
- 1. (Closed) Open item (50-70/78-06): The safety analysis portion of Change Authorization No. 659 does not address the use of 1/2" concrete anchors.
Licensee representatives stated that the 1/2" concrete anchors are not subject to significant pullout or shear loads. A letter dated August 2,1978 from G. D. Hoggatt to J. H. Cherb provides documentation of this determination. This item is closed.
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- 4. Primary Heat Exchanger Seismic Restraints
- a. Implementing Procedures The following documents associated with the primary heat exchanger seismic restraints were examined:
Change Authorization No. 659, dated May 12, 1978 Fabrication Specification 22A9242, Rev. 2 of June 1978 Installation Specification 22A9243, Rev. O of May 1978 Design Basis Specification 22A9230, Rev. 1 of May 1978 No anomalies, except as noted in Paragraph 3.d above, were identified.
- b. Observation of Work The installed primary heat exchanger seismic restraints were examined for conformance to drawing and specification require-ments. The following items were noted:
(1) One lateral restraint wall pad on the upper support collar is lacking two (2) Phillips wedge anchors (Ref.
Part 9 Drawing No. 913E252, Rev. 0.)
(2) Parts No. 36 and 37 on Drawing No. 913E252, sheets 1 and 2 Rev. O has been replaced with a 3/8 NPT pipe plug.
(3) Approximately 2000 lbs. of lead shielding has been added to the prima)y heat exchanger and temporary support pipes have been retained.
Licensee representatives were aware of these items and will document the as-built conditions. Design changes will be reviewed by EDAC. No items of noncompliance or deviations were identified. Documentation of as-built conditions will be examined further during a subseqJent inspection. (70/78-08/01),
- c. Review of Quality Records The following quality records were reviewed:
(1) Material requisitions, purchase orders, and certifi-cations for 3/4" and 1/2" concrete wedge anchors, rock bolts, and 35 ton screw Jacks.
(2) Engineering releases (ERs) for site fabricated components and associated inspection reports (irs).
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1 (3) Operations request forms (0RFs) for site installation and associated inspection reports (irs).
(4) Welder performance qualification records for three welders.
While no items of noncompliance or deviations were identified, the following documentation discrepancies were noted: '
(1) Revision No.1 to Purchase Order flo. 529-EM710 revised the screw jack madel number from 3510C to A35108.
Drawing No. 913E252, Rev. O shows model fio. A3510.
(2) Inspection Reports 3736'and 3739 incorrectly identify the applicable weld procedure as P8GYR3, instead of P8GYR83.
Revision numbers are not indicated for Drawing 913E268 and Specification 22A9242.
(3) Inspection Report 3739 does not identify the welder of piece G2. ,
(4) Inspection Reports 3745 and 3747 do not identify the revision number for Drawings 913E268, 913E270 and 153C4698.
Licensee representatives state that all modification record packages will undergo a QA audit and that the audit of the primary heat exchanger record package had not yet been per-formed. Quality records will be examined further during a subsequentinspection'(70/78-08/02).
- 5. Primary Piping Seismic Restraints
- a. Implementing Procedures The Design Basis Specification No. 22A9217, Rev. 0 was ex- :
amined. One item concerning inspection responsibility, as noted in Paragraph 2.d above, requires clarification. The change authorization, fabrication and installation specifi- )
cations were examined during previous inspections. ;
- b. Observations of Work Five primary piping seisni!c restraints were examined for conformance to drawing and specification requirements. The following items were noted:
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(1) The jam nut application method did not appear to be
. consistent in that the jam nut was installed over the standard nut on some connections of support No.1-8 while the reverse was true for other jam nut installations.
(2) The design of support No.1-10 was noted to have changed sigt.ificantly from the original design proposed by EDAC.
The design changes had been approved by the licensee.
Licensee representatives stated that the inconsistency in jam nut applications would be investigated and appropriate action taken. As noted in Paragraph 3.d above, EDAC will review all restraint design changes to verify the assumptions and models used in their analyses are still valid.
No items of noncompliance or deviations were identified.
- c. Review of Quality Records The following quality records were reviewed:
(1) Material requisitions, purchase orders, and certifi-cations for steel shapes.
(2) Engineering releases (ERs) for site fabricated components and associated inspection reports (irs).
(3) Operations request forms (0RFs) for site installation and associated inspection reports (irs).
(4) Deviation Report (DR) No. 3642.
Two items were noted as a result of the review:
(1) DR No. 3642 identified eleven (11) pieces of material from Drawing 913E173, Rev. O which required weld repair.
IR No. 4050 indicates seven of the eleven pieces were examined and found satisfactory following weld repair.
A record for the remaining four pieces could not be immediately located. Licensee representatives stated that the situation would be investigated.
(2) ORF 202-46 includes requirements for QC inspectors to indicate satisfactory torquing of bolts by initialing the ORF. It was noted that the torquing is only partially completed at this point but that initials had not been applied for the torquing thst had been completed. The inspector advised the licensee representatives that inprocess records of torquing should be maintained to assure validity of final records. Licensee representatives stated that appropriate action would be taken in this regard.
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-1 Corrective action on'the above two items will be reviewed: '
during a subsequent inspection (70/78-08/03).
No items of noncompliance orl deviations were identified.
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- 6. Exit Interview . ,
4 The inspectors met'with~the licensee representatives (denoted 'in Paragraph 1) at the~ conclusion of the inspection.1 The inspectors -
summarized ~the scope of the' inspection and the findings. The open items were highlighted. The licensee' representatives stated that corrective action would be initiated on the findings, as indicated lpreviously in this report. ]
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