ML18033A230

Followup to NPDES Noncompliance Notification Re Repair of Sedimentation Pond.Repair Started 871221 & Concluded on 880210.Seepage Observed on 880321 So Pond Not Placed Back in Svc Until Further Repairs Undertaken

ML18033A230
Person / Time
Site:	Browns Ferry
Issue date:	05/13/1988
From:	Brooks R TENNESSEE VALLEY AUTHORITY
To:	Horn C ALABAMA, STATE OF
References
NUDOCS 8805200212
Download: ML18033A230 (7)

Text

ACCELERATED DI'4iQBUTION DEMONSTRPIION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8805200212 DOC.DATE: 88/05/13 NOTARIZED: NO DOCKET g FACIL:50-259 Browns Ferry Nuclear Power Station, Unit 1, Tennessee 05000259 50-260 Browns Ferry .Nuclear Power Station, Unit 2, Tennessee 05000260 50-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee AUTH. NAME AUTHOR AFFILIATION BROOKS,R.H. Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION 05000296'UBJECT:

Alabama, State of R

Followup to NPDES noncompliance notification re repair of sedimentation pond. I DISTRIBUTION CODE: C001D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Licensing Submittal: Environmental Rept Amdt & Related Correspondence D NOTES:G.Zech 3 cy. 1 cy. 'ea to: Ebneter,Axelrad,S.Richardson '05000259 8 B.D.Liaw, K.Barr, OI.

G.Zech 3 cy. 1 cy. ea to: Ebneter,Axelrad,S.Richardson, 05000260/

B.D.Liaw, K.Barr, OI.

G.Zech 3 cy. 1 cy. ea to: Ebneter,Axelrad,S.Richardson, 05000296A B.D.Liaw, K.Barr, OI.

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL JAMERSON,C PD MORAN,D GEARS;G INTERNAL: ACRS AEOD/DOA 1 AEOD/DSP/TPAB ARM/DAF/LFMB 1 NRR/DEST/ADE 8H NRR/DEST/SGB 8D 1 NRR/DREP/RPB 10 -ABSTRACT 1 OGC 15-B-18 LE 01 1 EXTERNAL: LPDR NRC PDR NSIC NOTES: 9 8

D TOTAL NUMBER OF COPIES REQUIRED: LTTR 34 ENCL

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TENNESSEE VALLEY AUTHORITY NAY )3888 Mr. Charles Horn, Director Mater Division Alabama Department of Environmental Management 1751 Federal Drive Montgomery, Alabama 36130 Attention: Ms. Treena Piznar

Dear Mr. Horn:

BROWNS FERRY NUCLEAR PLANT (BFN) NPDES PERMIT NO. AL0022080 SEDIMENTATION POND - DISCHARGE SERIAL NO. 102 This is a follow up to my February 24 and March 25 letters to you regarding the repair of the sedimentation pond at BFN. This is our report on how the sedimentation pond was originally constructed. the extent of the repairs, and the results of the testing to determine the success of the repairs.

The pond was constructed around 1970, as part of a two pond system for treating metal cleaning wastes. Concentrated wastes were initially pumped to a lined pond, and then subsequently pumped to the sedimentation pond where they were diluted with river water prior to discharge. After BFN went into operation in 1974, wastewaters from the water treatment plant were also routed to the sedimentation pond. These wastes originated from the regeneration of the resin beds and filter backwash.

The pond received this type of waste until March 1987, when the water treatment facility was removed from service. Since that time, a mobile water treatment facility (Ecolochem Inc.) has been providing demineralized water for BFN. The waste from this facility consists of filter backwash which contains alum, and is currently being routed to the lined pond while the sedimentation pond is out of'ervice.

The sedimentation pond was built as a nonpermanent facility with a clay layer approximately two feet thick. The quality of the construction material was poor. The current repair work started on December 21, and concluded on February 10, During the excavation, it became apparent that the material used to originally construct the dike was not properly engineered after numerous stumps, rocks, and pipes were discovered in the dike. An area was excavated approximately 12 feet wide and 8 to 10 feet

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below the bottom of the pond. At this depth, we were able to identify suitable material to serve as a base for the excavated area.

fill that was placed in the In addition, the new repair was tied into the area repaired in 1985. The 1985 repair work to the dike was done in a manner similar to the most recent work. The excavated area was backfilled with clay having a compaction of greater than 98 percent of the maximum Proctor density.

In an effort to ensure integrity of the latest construction repair, on March 18 the pond was filled to a depth of 12 inches with river water.

On March 21, seepage was observed in the switchyard drainage ditch on the southwest side of the sedimentation pond. Therefore, the pond has not been placed back into service, and will not be used until further repairs can be undertaken.

Because of the problems experienced with this pond, BFN intends to install a synthetic liner. We have initiated the design process, and plan to submit an engineering report to your office by July 29 for your review and approval. Until the pond is retested, it will remain out of service. Wastewater will continue to be routed to the lined pond and not discharged.

If you or your staff have any questions on this matter, please have them contact Madonna E. Hartin at (615) 632-6695 in Knoxville.

Sincerely, ORIGINAL SIGNED BY.

RALPH K BROOKS Ralph H. Brooks, Director Environmental Quality cc: Mr, K. P. Barr, Acting Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region XI 101 Marietta Street, NW., Suite 2900 Atlanta, Georgia 30323 Mr. Bruce R. Barrett, Director Water Management Division U.S. Environmental Protection Agency, Region XV 345 Courtland Street, NE.

Atlanta, Georgia 30365 Continued on page 3

Mr. Charles Horn NAY 33 $ 988 U.S. Nuclear Re u Attention: Document Control Desk Washington, D.C. 20555 Mr, G. G. Zech, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852

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