ML20064E293

From kanterella
Jump to navigation Jump to search
Deficiency Rept Re Silting Condition in Svc Water Intake Structure.Initially Reported on 790618.Evaluation of Cause of Condition in Progress.Next Rept Will Be Submitted within 30 Days.Also Reported Per Part 21
ML20064E293
Person / Time
Site: 05000000, Zimmer
Issue date: 06/20/1979
From: Borgmann E
CINCINNATI GAS & ELECTRIC CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20064E073 List:
References
FOIA-82-206, REF-PT21-79 10CFR-050.55E, 10CFR-50.55E, QA-1148, NUDOCS 8301050271
Download: ML20064E293 (2)
v • d • e


Text

_

') O 9 L s

THE CINCINNATI GAS & ELECTRIC COMPANY c '2 -r cimeinwanomo .sao,

.E d..".[.7.E'.7." June 20, 1979 QA-ll48 2.-

i g

U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. James G. Keppler Director -

Gentlemen:

RE: WM. H. ZIMMER NUCLEAR POWER STATION - UNIT 1 SERVICE WATER INTAKE STRUCTURE - 10CFR, PART 21 DOCKET NO. 50-358, CONSTRUCTION PERMIT CPPR-88, W.O. #57300-957, JOB E-5590 This letter confirms the te'lephone conversation on June 18, 1979, between Mr. G. Fiorelli of your office and myself, con-cerning the Service Water Intake Structure for the Zimmer Project.

A silting condition, the cause of which at this time is indeterminate, could result in a reportable item in accordance with the requirements of 50.55(e). An evaluation of the cause of this condition is in progress by our architect engineer, Sargent

& Lundy, and ourselves.

The degree of silting could be the result of an abnormal intake condition caused by the initial removal of the closure bulkhead and intermittent service water pump operation compounded by several flooding periods of the Ohio River'. It could possibly be the result of the particular design configuration of the. intake structure.

We shall apprise you within 30 days of this letter of the progress in the evaluation of the identified condition.

Periodic reports shall be submitted in accordance with regulatory requirements.

1

? .

Jun 251879 8301050271 821116 PDR FOIA DEVINE82-206 PDR

~

.o THE CINCINN ATI G A7s & ELECTRIC COMPANY To: U.S. Nuclear Regulatory Commission June 20, 1979 QA-ll48

FROM
E. A. Borgmann pact no. 2 l

i

.) -

We trust that the contents of this letter will serve a to initially identify those problems associated with the Service -

i Water Intake Structure.

Yours very truly, THE CINCINNATI GAS & ELECTRIC COMPANY

,r E. A. Borgmann Sr. Vice President WWS :jk e

e 4

6 o

M l

l e

9

- , , - - - - - . - . - ------,e,n, ---m.,---, -------n,e-,---m,- -- - - - - , ,- s

Y 4s_&

THE CINCINNATI GAS & ELECTRIC COMPANY h xQ+W~-

r"2 CINCINN ATI.OMIC d 5201 5 .

y .

, '^ * **"*"" L i -

July 23, 1979 QA-ll68 t

'A U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 f

' 7,' j{EP Attention: Mr. J. G. Keppler Director Gentlemen:

RE: WM. H.

ZIMMER NUCLEAR POWER STATION - UNIT 1 SERVICE WATER INTAXE W.O. 457300-957, STRUCTURE 50.55 (e)

JOB E-5590 On June 20, 1979, we submitted our letter QA-1148 to your office, identifying a silting condition.which had been dis-covered in the river pump house intake flume and intake structure.

We that have it was evaluated influencedthe to cause a of this large condition extent by and have various seasonaldetermined river conditions.

bulkhead between September,The 1976river andentrance to the intake flume was sealed by March, 1978. During the period (2) of September, 1976 through April 24, 1979, there were two 3 long duration flood stages of the Ohio River which were the '

apparent intake cause of much of the collection of sedimentation in the flume. The service water pumps were not in operation during most of this period and as the river increased in elevation and subsequently returned to pool stage, ,

j in suspension was deposited within the intake flume behind thethe silt normally held bulkhead.

\

A thorough inspection of the intake fiume and the service  !

water pump bay was conducted and a significant amount of sedi-mentation was discovered. We are presently in the process of  !

1 removing this sedimentation and anticipate that during pormal plant operation parable similarcondition.

sedimentation circumstances will not result-in a ecm-Also, during operation of the )

plant, a sedimentation monitoring program will be implemented to =

1 I

assure that excess sedimentation is not accumulated in the intake. l JUL 2 61979 W *h 99 h']Lt !HW l i

THE CINCINNATI CAS & ELECTRIC COMPANY v>. U. S.

Nuclear Regulatory Commission July 23,1979 FROM: E. A. Borgmann -

QA-1168 4  % ,

~

s,4ag uo, 2

'i I -

evaluated, and procedures will be developed e ngwhich ure that the intake consistent flume and with operational structure requirements. are maintained i n a condition design and construction, which were it toorrected, remain und in uncIn 1

' plant at any time throughout the expected powerlifetime and is which represents considered a reportableany one of four other specified item. n t co e plant, ons, di i implemented has assured non-degrodation the plant. of thhave eaning action e safe operation of reportable under the requirements of 10CFR50.55 We will on e) .

is established and include a copy ofurthe mation. plan gram infor- <

for y We trust that this lette l

regarding the monitoring program,r, along with future transmittals of 10CFR50.55(e) and close the item reported on Junewill satisfy those requ 18, 1979 relative to silting of the service water intake structure .

Yours very truly, THE CINCINNATI GAS _& ELECTRIC COMPANY

/s. . _a E. A. Borgmann 7 WWS:jk Sr. Vice President G

e o

e 0

_ "' "

Retrieved from "https://kanterella.com/w/index.php?title=ML20064E293&oldid=2660401"