ML20005E567

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Forwards Proposed Change to NPDES Permit Re Planned Replacement of Through Flow Traveling Screen,Per Part II of Environ Protection Plan Tech Spec 3.2
ML20005E567
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 12/21/1989
From: Creel G
BALTIMORE GAS & ELECTRIC CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20005E568 List:
References
NUDOCS 9001080150
Download: ML20005E567 (6)
v • d • e


Text

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i B ALTIMORE a

GAS AND '

ELECTRIC CHARLES CENTER.P.O. BOX 1476 BALTIMORE, MARYLAND 21203 -

GroRot C. CartL viet p.e.,oi., December 21.1989 Nucitan reethov j (soo eco mass U. S. Nuclear Regulatory Commission l Washington, DC 20555 ,

I ATTENTION: Document Control Desk c

p

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & $0-318 .

!- Prooosed Chance to Existine NPDES Permit

! Gentlemen: ,

In accordance with Appendix B of the Calvert Cliffs Facility Operating License, Part

! II, Environmental Protection Plan (Non-Radiological) Technical Specification 3.2, attached is a copy of a proposed change to our existing NPDES permit. The change regards the planned replacement of the through-flow traveling screens with a dual flow i 4 design.  ;

Should you have any further questions regarding this matter, we will be pleased to discuss them with you.

1 Very truly yours, j

, ( U GCC/DDhi/bjd

Attachment:

Letter from hi J. Welland (DG&E) to J. A. Veil (hiaryland Department '

of the Environment), 'Calvert Cliffs Nuclear Power Plant-NPDES Permit

~

No. 86-DP-0187: Traveling Screen Replacement With FhtC Dual Flow Screens," December 15, 1989 cc: D. A. Brune, Esquire J. E. Silberg, Esquire R. A.Capra, NRC  ;

S. A.hicNeil, NRC W. T. Russell, NRC J. E. Beall, NRC T. hiagette, DNR C ce l 9001080150 891221 i

{DR ADOCK 05000317 PDC I L _ - _ _ _ - - _ _ _ - _ _ .- _ -_ ___-__ -- - --_

-t A SALTIMORE 6

OAS AND  !

ELECTRIC ,

1000 8RANDON SHORES ROAD e BALTIMORE, MARYLAND 21226 l (301) 787 5000 i L  !

FOSSIL ENGINEERING SERVICES I DEPARTMENT

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harwhar 15, 1989 l r

Mr. John A. Veil i Irukastrial Point Scnaron Division  !

Departaant of the Divirtrennt Point Breeze masiness Park  ;

2500 Broening Mittsday '

Baltlacre, ND 21224 >

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REL7BCT: Calvert Cliffs Nuclear Power Plant - NPEES Permit No.  !

86-DP-0187: Traveling Screen Replaossent with Flc Dual  !

now Screens *

, I I

Dear Mr. Veil,

As diarummad previously, BG&E is planning to replace the traveling >

screens at (.Azr Calvert Cliffs Ntaclear Power Plant. 'Jhs new screens ,

being proposed are MC dual flow traveling screens. Since cur '

l ocnversation, Richard McIm:n (PPER) cantacted me and requested further '

dstails regartiing screen design. Enclosed are the new screen specifications.

'the original screens (24 screens total for both units ocabined) used at Calvert Cliffs were F?C thrtnagh flew screens. '!hase screens were being used when igingement/entraissuunt studies were performed (1976-1980). In the mid 1980s, it was dar'idad to to dual flow screens in order to igrove performance of screens dur high igir1gement epiardam. Pbur of the old PMC screers were replaced with two Beaudrey screm (a dual flow screen), and two FMC dual speed screens (through flow). A survival study was ocrrhacted in June -

August 1986 to datarmine if there were significant differences between screen types. Based on this survival study, the Beaudrwy screens were censidated acceptable for replaosment of the old P?C screens.

Currently, the screen types and plaosments are the same as described in the 1986 survival study (copy attached).

'!he proposed P?C dual flow screens are similar in w.mL to the Beaudrey (i.e. they are both dual flow) . Informaticri showing l.

differences / similarities in design are attached. Sczne information is also included on the old DC through flew screens.

- - . - - . _ . - . - - ~_. . . - - - . . - . .. . _ - . . - - . _ -

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The eact schedule for replaomaant is net firm. Du Fall of 1990 would r M 1y be the earliest screen replacement. At that time, two acreens would be replaced and possibly an additional two screens if they are available. Eventually all screens will be replaced.

1 If there is anything else needed.for your zwiew, please acreact as at (301) 747-5114.  ;

sinoerely, Y

i , i e

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