ML19351E839
| ML19351E839 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 12/12/1980 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-583, NUDOCS 8012190418 | |
| Download: ML19351E839 (6) | |
Text
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The Light company,,,,_.,,, u-,, n_ m o., m,n n..,,,,,,. m, mnom, m.
a December 12, 1980 ST-HL-AE-583 SFN: V-0530 f-Mr. KaESeyfrit Director, Region'IV Nuclear Regulatory Cor. mission 611 Ryin Plaza Drive, Suite 1000 Arlington, Texas 76012
Dear Mr. Seyfrit:
South Texas Project Units 1&2 Docket Nos. STN 50-493, STN 50-499 Third Interim Report Concerning Backfill Material and Status Concerning Show Cause Item 2 Structural Backfill Investication On March 21, 1980,,
....; to 10CFR50.55(e), Houston Lighting & Power Cor:pany notified your office of an item concerning certain non-conforming backfill material The intent of this report areas located around the South Texas Unit #2 power block.
and its attachments is to provide a status on the structural backfill investigation and to address various related tasks which have been previously identified to your The attached Iridependent Review Committee report suonlements the orevious office.
Committes interim report, which was submitted as Exhibit 9 in our Response to the Order to Show Cause, July 28, 1980. This status report provides discussions concluding the following specifi'c activities.
Activities Completed By The Independent Review Committee The following tasks identified on pp.2-5 and 2-6 of the Show Cause Order reply have been completed:
Reviewing laboratory tests and design analyses perforred on the backfill l
1.
I concerning liquefaction and settlement.
Completed; see section 3.1 of Status Report.
Reviewing the reco:mendations and criteria for compaction of the backfill 2.
as documented in a series of geotechnical engineering reports issued by Woodward Clyde Consultants (WCC).
30/
Completed; see section 3.2 of Status Report.
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O flouston Lighting & Power Compam December 12, 1980 ST-HL-AE-583 SFN: V-0530 page 2 Reviewing the construction specifications and procedures f'or compaction of 3.
the backfill, including the actual construction and quality control methods employed in the field.
Completed; see section 3.3 of Status Report.
- 4.
Reviewing the prescribed and implemen+ed inspection and testing procedures for compaction control of the backfill placement, including the quality control methods and documentation implemented in the field.
The Committee has finished the review of the procedures, and has found them satisfactory. The task will be completed ihen the Task Force Review Of the quality control records becomes available (see item 5, below).
5.
Reviewing and analyzing compaction quality control test results collected and documented covering the construction period from 1976 to 1980.
This task remains open pending the Task Force completion of the quality control documentation review and compilation.
Reviewing the results of special investigations of the placed backfill to assess 6,
adherence to the design requirements, including the results of the test boring program performed during the spring of 1980.
Completed; see section 3.6 of Status Report.
In the event low density pockett are delineated in the backfill, reviewing the 7
efficiency of the methods proposed by B&R Engineering to treat those pockets to bring them into confonnance with the design requirements.
Complete as no remedial work is required; see section 3.7 of the Status Report, and close out of the structural backfill boring investigation findings pertaining to the low density indication west of the Unit 2 Reactor Containnent Building, as discussed below.
Inspecting the on-site laboratory facilities and equipment used by the existing 8.
testing agency, and reviewing the laboratory test procedures.
l Completed, see section 3.8 of 5tatus Report.
Reviewing the procedures, observing field operations, and evaluating the results 9.
of the test fill program.
Completed, see section 3.9 of Status Report.
l
Houston Lighting & Power Compe December 12,1980 ST-HL-AE-583 SFN:.V-0530 Page 3 D**D g 3[lUh gn on.1U oe r Low Density Indications; Construction Deficiency Borings with Standard Penetration Tests obtained by Woodward-Clyde Consultants (WCC) in January-February 1980, gave indications of densities below the construction quality control criteria in an area near the subgrade west of the Unit 2 Reactor Containment Building. The area was subject to further investiga-tion by borings obtained in March and April,1980. WCC has made a final evaluation of the test results has studied the validity of the test methods. WCC's report dated September 30, 1983 is attached. The field investigation and test results have previously been evaluated by the Independent Review Committee as discussed in sections 2.8 and 4.0 of the Committee's Interim report (Exhibit 9 to the July 28, 1980 response to the Order to Show Cause). WCC"s final evaluation confinns that the test data is correct, and also that the density of the backfill is satisfactory. The same conclusion is also reiterated in Section 3.7 of the Committee's status report. There is accordingly no need for any remedial work. The status report also addresses the ongoing work by the task force. The final Committee assessment of these items will be contained in the comprehensive report currently scheduled for submittal in February,1981. If there are any questions, please contact Mr. Michael E. Powell at (713) 676-8592. Very truly yours,
- b. p'rd Exec tive' ce President MEP/pjb Attachments
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i Houston Lighting & Power Compan> December 12, 1980 ST-HL-AE-583 4 SFN: V-0530 Page 4 cc: J. H. Goldberg D. G. Barker Howard Pyle R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons G. B. Painter L. K. English A. J. Granger R. A. Frazar H. S. Phillips (NRC) J. O. Read (Read-Poland,Inc.) M. D. Schwarz Baker & Botts) R. Gordon Gooch Baker & Botts) J. R. Newman Lowenstein, Newman, Reis, Axelrad & Toll) Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 i 1 4 l
1 1 December 12,1980 Homton Lighting & Pimer Compan> ST-HL-AE-583 SFN: V-0530 Page 5 M. L. Borchelt Executive Vice President Central Power & Light Company P. O. Box 2121 f Corpus Christi, Texas 78403 1 R. L. Range Central Power 6 Light Company l P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Hancock Director of Electrical Utilities i City of Austin P. O. Box 1088 Austin, Texas 78767 4 T. H. >Nehlenbeck I City of Austin P. O. Box 1088 Austin, Texas 78767 J. B. Poston Assistant General Manager of Operations City Public Service Board P. O. Box 1771 San Antonio, Texas 78206 A. vonRosenberg City Public Service Board P. O. Box 1771 San Antonio, Texas 78296 l r l l l \\ l j-1 I . ~. ..,-m,. .m.
December 12, 1980 Houuon Lighting & Power Company ST-HL-AE-583 SFN: V-0530 Page 6 Charles Bechoefer, Esquire Chainnan, Atomic Safety & Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Dr. James C. Lamb, III 313 Woodhaven Road Chapel Hill, North Carolina 27514 Dr. Emmeth A. Luebke Atomic Safety & Licensing Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Citizens for Equitable Utilities c/o Ms. Peggy Buchorn Route 1, Box 1684 Brazoria, Texas 77422 Pat Coy Citizens Concerned About Nuclear Power 5106 Casa Oro San Antonio, Texas 77422 Betty Wheeler Hoffman, Steeg & Wheeler 1008 S. Madison Amarillo, Texas Brian E. Berwick Assistant Attorney General for the State of Texas P. O. Box 12548 Capitol Station Austin, Texas 78711 Bernard M. Bordenick Hearing Attorney Office of the Executive Legal Director U. S. Nuclear Regulatory Commission Washington, D. C. 20555 _.}}