ML20085A417

Submits Monthly Activities Rept for Apr 1978

ML20085A417
Person / Time
Site:	Crane
Issue date:	05/02/1978
From:	Karrasch B BABCOCK & WILCOX CO.
To:	Roy D BABCOCK & WILCOX CO.
References
TASK-*, TASK-GB GPU-0378, GPU-378, NUDOCS 8307060471
Download: ML20085A417 (4)

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,JA Castanas DW LaBells C2 Connell DE Leinhart

,15 Davis AF 2fc3 ride THE BASCOCX & Wil.COX COMPA.R tr Dowlins x Schroeder l POWER GENERATION GROUP Sa Duerson JS Shively j

BM Duna JR Smocral Je Je catford sW Svans a D. N. Boy, Manager, Flant Design JR Hamilton RN Tumow y

JJ Happell' JS Tulenko J

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HW Benig RA um m a

3. A Rarrasek, Manager

• Plant Integration GK Jacks ses eas.s N

File No.

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Date April Activities Report

- May 2,1978 g,n s aa i

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SICM'iFICANT ACCDHFLISNHENTS

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Phase I.of tha variable T v. Pzugram was completed this south. Ths coecept selected for further study is a combination of the constant y

The and T,, droop =eh-a.

This method retains the basic improve-y in ---. ring capability while =4ai=hing the identified dis-advantagne of each of the two original ideas. A assagement informa-tion===d==r is scheduled for the week of May 22nd to present this concept. prior to initiatism of the second phase of the program.

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A series of meetings has been underway to discuss our Standard F1mr.

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Dealsa with Bechtal sed DECD to provide them the basis for the NSS-19 change orders. During the. month of April. asetings were held on tha Isactor Coo 1aar. and Secondary Systems and on the NIRPS and ESTAS.

Ther sessions have proven to be very fruitful information exchanges i

with both DECO and B&W striving to obtala a true Standard Plant om s

N55-19. Agreement has aise been reached to use the new Contract

.d, Tschafe=1 R===1*== (CTA) for the DECO contract in lieu of the FFL,TDL j

and a major portion of the CCI sheets. A draft of the document is now being prepared by the Plant. Integrator and FM and will be completed in the near future.

C.

A draft issue of the Easctor Vessel / Bead portion of the new ECS ::aquire.-

i ments $==affir= tion has been completed and forwarded to RCS Components for review and comment. In addition, a meeting was held with them to

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obtain feedback on the purpose and overall approach.co the document j

prior to initiating work on the other F03 components. The initial feed-back on the basic purpose. content, and format is\\ avorable; we will f

begin obtaining detailed comments from ECS Components in parallel with the preparation of the remainder of the requirements document. -

D.

A briafing van conducted with the componenc design units to discuas the proposed AIRS operating instructions. The basic concept, purpose and overall procedura for preparation and maintenance of AIRS was presented and the feedoack received from component Engineering, Equipment Engineer-ing and Flant Design Analysis Units was favorable. It was brought out, l

however, that WBS modifications will be required to maintain the AIRS document following preparation by the Analytical Units. Presently the COMEDENTIAl.

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• Subjt April Activities Esport 3/2/78 h

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Pe imits de met supply hardware dass to the analytical groups J

aiad also de est review their detailed designs for compliance with.

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analytical imput information. When the final draft of the Operating Instructice is completed in May, a WBS modification will be prepared to i=='

c the inew system.

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' j l I; ' The Error Analysis Task Fbree Report was approved this month by Planc

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Dosism and Equipment Engineerlag, and can now be used to form the basis for'1E equipment capabilities for mattay Mater Caepany C&I Equipumac.

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.Thist report has been used to resolve inconoiscesc.es between tha Equip-p ment S==-484_==tism requir===*= and the actual eqsipeest capabilities 4

- and the6 backlog contract Equipment Specifications have been revised daring the M=e-t resolution process; we are now upgrading the f,

System Esquirements Specs to reflect the resolution of the.11 Equipment n.reco.=**= requirements.

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.DISIOSITICE OF FREFICOS PRDgLIMS.

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A The NBC has oHief alty requested that B&E addre.ee the requirements for

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• mar-w with the Staff cold shutdoom critar'.a prior to completion b

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of the ig$ety Evaluation Report and PDA on the asAR-205 project. Our y

position op until aow has been that the NSSS 14 designed for safety-

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grade het shutdown, and that there is a very.emm11 besafit to plsac safety in going to a safety grade cold shutdcon syntae. It near appears 1

that thea pressure'on the FIa may force us' to investigate a compromise I

.S position om. the cold shutdown question which would moet certainly ia-clade same additional equipment modifications te.seet the itRC require-

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.V meets for compliance. with this critaria.' A response to NRC will be T,

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made early is tha asoch of May.

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s E.. A final progyautwas laid osc for resolution of the Mark. C FA Standard l

' leads problem Since credit from core catcher los restraint is not-f===4hf% the 'rmeoletion is directed towards refinement of the core /

fuel assembly analysis model. There la high confidence that this E

program will roomit is acceptability of the Standard leads. Implemaa-p tation is eunitfag the identifikation of. sufficient haehtag offset

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membours to complete this program s

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A recommended approach for resolving the adequacy of the power distri-bution data used la the reactor internals samma beating analyses was I

distributed for comment, and cost and schedule estiantes. The proposed h

program has the following objectives

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(1) Detenmine the effect of the preliminary higher axial power profilms on the curreac17 documented reactor internals samme heating faces /

I stress==1yses.

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Cc-e-work ou TECO II & III gamma beating rate analyses to minimize impact os asterial ordering /msaufacturing schedulee

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Karrasch te Boy Page Ihree i

Subit April Activities Emport

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(3). Confirm the adequacy of the preliminary axial powse profile L

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data to be used in (1) and (2) above as soon as possible to O

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=d=f=4 = the risk of CSA reanalysis.

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7-*==-=**= will be coordinating this effort which has the potential

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, for *-- ri== a e===ia-rab3a amount of reactor internals strees analysis g

A The small break probleur has been fd== riff =d as a asjor safety concera j,'

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~ph- #1 under 10CIE Face 21 for the louered loop 177 fuel assembly 1-- -

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Became denlyses have shoue that the Eigh Pressure Injectice d'

y System flow capacity is inadespaste for a specific range of===11 10CA's L

in the piping.betweest the Beactor Coolaat Finop and Reactor Yessel.

Analysee have besa run to show. that the core does not remmia c lately F

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oevered for a spectruse of breaks, rassing between.04 and.2 f A

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aignificane effort has been undesuey to resolve this problem the past 5

eeveraL weeks with progress. to date se folloust

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(1)*- A means to improve the performancer of the Eigh. Pressere Injection.

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._ ' System meif f =4=g operator action outside the control room has bese*

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'identiffad Each of the affected customers has ese=ht f ah-d a pro-("

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cadura and committed to perform'this action withim the first tam.

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=8==*=, f="- *=~ ESTAS actuattom.

? (2k -ICCS. Analysis has performed, a.pestrum analynia. for the 2368 Itat.

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. plaats, estas as improved evaluettom model and the additiceal HFL g.

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.r 9, fros-fr (1) above. Co.results of. this analysis are acceptable

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under the-criteria of 10CrE 50.44. The Mas: is now reviewiss this analysis and hopefully this interim fix for operator action will

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allow conciamed operation of the 2568 Inst. plaats at full power.

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Bark===ininp. to fully resolve this problem igeledes the followings p

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(1).Forform analysis as n=*====ry to,damenstrate esapliance to 10CrE 50.46 for B&W's 2772 5tst. plaats, utilising se interim r

l operator acties fix.

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(2) Ferform analysis as necessary to====faa long term solutions

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i for all plaats meiYf sing a less restrictive requirement for r

operator sation to sitigate the consequences of this event.

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(3)

TJ=nef Fy potential equipment / hardware changes which moeld g'.

provide the decessary caergency core coo. ling system floor L

ascometically or by operator action from the constrol room.-

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Naka appropriata reen===adations to utility customers for incorporation into their plaats.

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(4) Update and revise' topical reports as necassary to reflect a r

y new-analysis and hardware on R&u's 177 fuel assembly plaats.

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A detailed Icgic flowchart and schedule for the remaining work is now

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being prepared and will be presented at a User's Cr6up Meeting during 5

the first week in Mar.

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-s 15 QGiwilinr n STATUS REFORY - APRII. -.

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samrisuzr.a sa COMPI.ZTED - None

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Gassir.uaa MISSED - Noos A

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REVISED COMMITMENTS - None t

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