IR 05000395/1979014
| ML19224D641 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/18/1979 |
| From: | Herdt A, Swan W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19224D631 | List: |
| References | |
| 50-395-79-14, NUDOCS 7907130225 | |
| Download: ML19224D641 (4) | |
Text
{{#Wiki_filter:* r
[pa arco,#'o UNITED STATES NUCLEAR REGULATORY COMMISSION E'g*,",',]7f(' REGION 11 -:
s
o, f 101 M ARIETT A sT., N.W., sulT E 3100 W g AT LANT A, G E oRGI A 30303 ..... Report No. 50-395/79-14 Licensee-South Carolina Electric and Gas Company P. O. Box 764 Columbia, South Carolina 29218 Facility Name: V. C. Summer Nuclear Station, Unit 1 Docket No.
50-395 License No.
CPPR-94 Inspection at Summer Site near Jenkinsville, South Carolina 5//.//[[ Inspector: ?[ [ s. _ff s W.
B.' Swan Date Signed Approved by: M ht f///[7f A. R. Herdt, Section Cliief, RCES Branch Date Signed SUMMARY Inspection on April 30 and May 1, 1979 Areas Inspected This routine, announced inspection involved 16 inspector hours onsite in the areas of dome tendon stressing; QA plan revision; cable tray hanger welding; and anchor plate bolt torquing.
Results Of the areas inspected, no apparent items of noncompliance or deviations were identified.
369 077 '907130 2 2 ( Q
. . DETAILS 1.
Persons Contacted Licensee Employees H. I. Donnelly, Director, Compliance & Reliability
- D. A. Nauman, Manager of QA and Security
- D. R. Moore, Director of QA Audits and Surveillance Systems A. A. Smith, Site QA Coordinator and Operations QA Supervisor E. Evans, QA Supervisor J. E. Bocock, QA Supervisor
- R.
J. Bauknight, Surveillance Supervisor F. S. McKinnon, Mechanical QC Specialist Other Organizations J. Brown, INRYCO, Lead QC Inspector W. Murray, INRYCC, Project Manager
- W. L. West, Daniel Construction Company, Project Quality Assurance Manager
- C. C. Wagoner, Daniel Construction Company, Project Manager
- Attended Exit Interview 2.
Exit Inte rview The inspection scope and findings were summarized on May 1, 1979, with those persons indicated in Paragraph 1 above.
The areas of tendon stressing, QA plan revision, cable tray hanger welding, and anchor plate torquing were discussed.
3.
Licensee Action on Previous Inspection Findings Not inspected.
4.
Unresolved Items Unresolved items were not identified during this inspectior 5.
Independent Inspection Effort The following matters were inspected: A.
The revised Quality Assurance Plan, including Section IV, Site Surveil-lance Plan Revision 4, was reviewed.
Issuance of the revised plan was awaiting approval of the two page Stat ement of Policy, by the corporate Vice President and President.
369 078
. -2-B.
NCM 738M (pertaining to Weld No. 256 and a companion similar butt weld on 5" X 5" X 5/16" angle iron extensions made to support additional cable trays) was reviewed and the location of the welds in the control building cable tray tunnel was visited. The welds had been cut out and replaced. The removed welds had been found to have linear indica-tions when examined by magnetic particle; and the welds failed tensile and bend tests. The licensee has changed procedures to require the presence of QC during backgouging, of all electrical hanger butt welds.
C.
The licensee and Daniel Construction Company (DCC) personnel revealed that, in response to a DCC workman's allegations that tack welding of anchor bolts to anchor plates prior to torquing of the nuts had been done, inspection of the anchor installations designated by the allegor revealed no instance of tack welding. At another location, DCC found that one bolt had been tack welded.
DCC tensile tested the bolt and it failed below the nominal strength. At another location the licen-see's QC personnel found that a bolt had been fixed in an anchor plate by insertion of a piece of file. The bolt threads had been gouged.
These findings were turned over to DCC and AE resident engineers for evaluation as to significant impact or the integrity of the anchors.
The licensee's QA unit received an evaluation from Engineering stating that neither item was found to negatively impact systems safety.
The engineering evaluation will be reviewed under inspection follow up item 395/79-14-01.
In these areas the NRC inspector identified no items of noncompliance or deviations.
6.
Containment (Prestressing) - Observation of Work and Work Activities - Dome Tendons The acceptance criteria in FSAR Section 3 for the containment prestressing system were incorporated into Gilbert Associates Inc. (GAI).
Specification SP-207-4461-00, Revision 11 dated November 3, 1978, " Fabrication and Installation of Reactor Building Post Tensioning System".
Implementation of quality control is provided by the INRYC0 Field Installation Manual, QAP-6 "INRYC0 Quality Assurance Audit Procedures Field Operations", and INRYC0 drawings 675-1 thru 675-20 including ECN's thru ECN 1251 dated 3/19/79.
FSAR Section 3.8.1.6.3.3 required that stressing of the tendons in the reactor building would be done using six sets of stressing equipment placed symmetrically around the structure. This requires simultaneous use of the only six stressing jacks INRYC0 possesses.
Jack # 6 (9366) has ram area variations which prevent its calibration to the same gauge pressures used on the other five jacks to give a specified tendon stress at 80% of u!.timate (designated the overstress point) at the lockoff, or operating stress.
To compensate for this INRYC0 prepared a gauge pressure versus tendon stress chart for Jack #6.
Separate stressing cards were prepared for every dome tendon on which Jack #6 is used.
The required gauge pressures at overstress 369 079
, .
< . -3- ' and lockoff are entered on these cards to assure that the tendon stress imposed by Jack #6 matches the stress imposed by the opposing jack. Three sets of these dome tendons were stressed by IKRYC0 during this inspection.
The inspector observed stressing of the first and third sets: D-109, - 209, and - 321 D-113, - 213, and - 313 Simultaneous imposition of loads was accomplished by radio communication.
Equalization of elongation perceived at each jack was achieved by slight time delays during load increases where substantial differences in elongation initially were measured at the ends of a tendon. The total measured elonga-tion of each tendon fell within the allowed range from calculated elongations.
INRYC0 QC reported that during stressing of the second set, D-117; - 217; and -325, three tendon wires had broken. The stressing loads had been readjusted (reduced) to accomodate the lesser number of tendon wires,167 versus 170.
Tne inspector sampled the calculations used to plot the gauge pressure versus tendon stress chart prepared for Jack #6 and the stressing cards made up for use wherever Jack #6 is utilized; and verified the licensee's acceptance.
Inspector Followup Item 395/79-06-01 pertaining to calibration of Jack #6 is closed.
No items of noncompliance or deviations were identified.
7.
Containment (Prestressing) - Review of Quality Records The control documents listed in paragraph 6 require the keeping of quality records. These are detailed in the INRYC0 Manual. The data are signed off by the INRYC0 inspector and a SCE&G inspector.
Prior to this inspection all 99 dome tendons had been installed in the sheaths.
All vertical tendons had been stressed, and the sheaths filled with protective grease.
The tendon pulling (insertion into sheath) cards for the dome tendons and the greasing cards for the vertical tendons were reviewed.
The tendon stressing cards for the two sets stressed on April 30, 1979, were reviewed.
These were: D-113; - 213; and -313 D-117; - 217; and -325 These cards showed that the specified gauge pressures were met at over-stress and lockoff points; and that the measured elongations were with 0.45 percent of the calculated elongations and were acceptable.
No items of noncompliances or deviations were identified.
369 080 }}