ML19225A190

Interim Significant Deficiency Rept on 770608 Re Flood Damage Equipment.Water Entered Power Block Bldg During Heavy Rains Causing Flood Damage.Caused by Unfinished Const.Will Be Eliminated When Bldg Is Roofed

ML19225A190
Person / Time
Site:	Wolf Creek
Issue date:	07/13/1979
From:	KANSAS GAS & ELECTRIC CO.
To:
Shared Package
ML19225A187	List: ML19225A186 ML19225A190
References
NUDOCS 7907180537
Download: ML19225A190 (4)

Text

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.2.0 Contractor 1,2 3.2 Safety Implicaticn3 2 4.0 Corrective Acticns 2,3 73 I. 7 34<J 790718o63'/

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,;CLF CFIEK FLCOD DAMAGE FIPC FT 1.0 De scriction o f Deficiency Curing the late evening hours of June 7, and during the early morning hours of June 3, 1979, torrential rains fell at the ?!alf Dree.-; Site.

Total accumulated rainfall during the period was nearly si> (6) inches.

Due to the construction status there were several pathwaya fo r Na te r to enter the pcwer block buildings; for examole, roofs were not ret in place, terrorary construction openings were not clcsed and portions of backfill were not complete making a basin around portions of the buildings.

The Radwaste Building is connected to the Auxiliary Buil hn; basemen; by a large pine tunnel. A lot of the water vhich fell iato or ran into the Radwaste Building ficwed through the tunnel in'.o the Auxiliary Building basement, where most of the flood damage occurred.

T'. e elevation of the Auxiliary Building basement is 1974 feet.

The high ater point was 1975 feet 6 inches, or approxinately 18 inches above tne basement floor.

Pumps, both electric and encine driven, were used to cump out the inflow; however, three negative factors caused the ef. art to faiA: ( a) The electric sump pumps were fed power frcm a scurce located in the basement.

lhen the pumps started to fall behind, power to the lowec level was turned off and the electric cumps no longer could help with the battle.(b) The diesel engine pumps have a low head capaci~-

Because they were working acainst 25 feet of head, their capacity was greati; dimin-ished.(c)Facause of the large amount of surf- e water around the power block, normal drain ~ age was impossible thus causing a considerable amount of the pump discharge to flow back to the excavated area around the Auxiliary Building and back into the basement.

The safety-related equipment, which was totally or cartially submerged, identified and listed on 24 Deficiency Reparts and i;onconformance was Feports.Approximately 107"Q" itens are involved; incluaal is piping, valves , purps , motors , limitorque valve operators, gear boxes and electrical control equipment.

2.0 Centractor The Nolf Creek Generating Station is beinc constructed by Daniel International Corporation.

Daniel personnel fought the ficed water, documented tne damage, will, with ssistance where appronr: ate, clean and insnect p .ng and valves, and will remove and ship the items being retecned to vendcrs for rework.

Sechtel, for items within their scope of suoply, is notifying vendors of the problem. They will establish with the vendors the requirementa for res toring new con, tion and will perform associated procurement functions. ,-3 7-_ Yth For destinghcus scope of supply items, the destincncuse resident dite Representative will supervise all work performed on site and will co-ordinate hipments and o f f-site rework.

3.0 Safety Implication The submersion of safety-related equipment, especialli electrical equipment, if left ": corrected could reduce the likelihoed that the

, equipment would reliably perform its safety function throughout :lant life.However, tiost of the items which were submerged can and will be fully restored to their original 'cw condition. Some types of ite.s, enich cannot be econcmically res tored, will be replaced.

sina a combination of re+ cork and replacement, all affected equipment will be fully restored and no degradaticn of the ability of the equipment to perf orm its function will result from the inundation.

4.0 Corrective Actions Corrective actions to prevent addiLional flood damage:

The causes of the floodinc of the lower level of the Auxiliary Building will be permanently eliminated

'..i uo-Power Block Buildings are roofed, tempocary construction openings closed and backfill placed. However, to prov ide improved protection for the interim period, the temporary constructicn opening in the Radwaste Building has been closed, standby sandbags have been placed adjacent to the Auxiliary Building construction openinc, the Auxiliary Building s amp pump power supply has been relocated to a higher elevation, and completion of the yard drainage system is being accelerated.

Corrective actions to restare flood damaged equipment Corrections started by washing down the equicment with clear water.Sear boxes were drained, flushed and filled with new lubricant. The same was done for moto; bearings wiin oil reservoirs.

Piping and valves will be cleaned by Daniel forces, 4ssisted by suppliers when appropriate, follcwing existing cleaninc procedures. The final flush of stainless steel piping and valves will be .ith demineraliced water, acetone or i sopropyl alcohol.Engineered items will be restored by or vider the supervision of the original ,uppliars.

It is expected certain items will be returned to th e candor shcps for cleaning, inspection, parts replacement (when necessary) and testing.

In seme cases,'7$3; s: 1.--

.t nowever, it na/ be advantageous to have '/endor r erconnal 0 me t0 tne 31te to perform ar.d/or supervise the work. In a.1 cases curchaJe orders will be negotiated with the original vendors to fully restore the equirment to the original new, fully-warranted condition.

If this obiectiv,.

Cannot be attained effectively, renlacement parts anh/or

-t~rnn->'1'11 be procured and installed per oricinal

'^o-~3FeC1 fica cion requirements . ,...