ML20101E196

From kanterella
Revision as of 02:23, 29 April 2020 by StriderTol (talk | contribs) (StriderTol Bot insert)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Slide Presentation Entitled, Gessar Source Term Analysis, Presented at 840209 Meeting in Bethesda,Md
ML20101E196
Person / Time
Site: 05000447
Issue date: 02/09/1984
From:
GENERAL ELECTRIC CO.
To:
Shared Package
ML20101E143 List:
References
FOIA-84-175 NUDOCS 8412260169
Download: ML20101E196 (5)
v • d • e


Text

~~'

Fs.; .-1.: ,.2:.# 3. 936..~S = :m-':L :-

~

[- .

ju.: E .

.ui

//-

GE-NRC MEETING

. :7 E' 7 .G

-(. . ;
. ESSA'R SOURCE TERM ANALYSIS BETHESDA,MD FEBRUARY 9,1984 1

l l

8412260169 840710 PDR FOIA SHOLLY84-175 PDR

4 ag j

M g 5 2 " T b : % T ".:7'

' 4 ;... . f;: :.

35.1RQ5le&.

R

n. :c; .: , . ; 1,$h.

7*-

., ,c .

. ; . . . ; +;. ,

we -

~ ~

,.-sm 4 , ,h, %.'

l GESSAR SOURCE TERM ANALYSIS MEETING OBJECTIVES-

~

o. AGREE ON APPROACH & METHODOLOGY FOR REANALYSIS o DEFINE RESPONSIBILITIES -

o AGREE ON ACCIDENT SEQUENCES -

' o STATUS OF NRC/BNL STRUCTURAL ANALYSIS -

o DEFINE SCHEDULE -

o SPECIFY ACTION ITEMS c.

i l

mi RNi/9,@ifP'W / A'B *W W'W-O~- ' '

MM

/ -

. ; ,q' c/; J  :-

a  ! -

  • j j -- ..; ;n l ,

j Vj J

GESSAR SOURCE TERM ANALYSIS s". iAPPROACHFORREANALYSIS w,;y s;,y - . .

" # - BNL/NRC BEST ESTIMATE SOURCE TERMS o CORRAL OUTPUTS (CRAC INPUTS) o MARCH OUTPUTS (CORRAL INPUTS)

- SELECTION OF ACCIDENT SEQUENCES FOR ANALYSIS WITH ASTP0 CODES (NRC/BNL/GE)

=

- DEFINITION OF GE SCOPE

. o REVIEW ALL BNL CODE I/O o RERUN CRAC SEQUENCES o GESSAR PRA SITE 6 PLUS H GH POPULATION SITE

! o EVALUATE PROP _ GN MODIFICATIONS w

  • ems au ace-*

. 5 o(\ A\63 popi l'A -t10k SPOC $

LiWddC%. Mr M .

Y

,1 9, (

.s .

.7 m,,,, ,- an r..s sq,n e .

w .

m w -

'~'1:

g- -

j-.__ .

...y 3:

u "3 .

~ .

. l l

GESSAR SOURCE TERM ANALYSIS

' PROPOSED SCHEDULE 1

o NRC/BNL ESI.IMATE OF SOURCE TERM INPUTS 2-10-84 o GE REANALYSIS OF RISK 3-15-84

- SITE 6 (GESSAR PRA)

- HIGH-POPULATION SITE

- PROPOSED DESIGN MODIFICATIONS _

/

o BNL VALIDATION OF ESTIMATES WITH ASTP0 CODES 3-31-84

- USE OF SELECTED SEQUENCES o;GE-NRC-BNL MEETING 4-4-84

- DISCUSS GE & BNL RESULTS

- CONTINGENCY. PLAN .

o GE REANALYSIS WITH NEW ESTIMATES o RESULTS OF CONTINGENCY REANALYSIS 4-18-84 o FOLLOW-UP MEETING 4-19-84 l

a*=

.=
r;>  ;-
: ~

~MQ:)yZ$$$f((

y; -m

.r1

~ S ~~ $ l1 g

GESSAR-II PRA REVIEW SCHEDULE- PROPOSED REVISION CLRRENT PROPOSED REVIEW MILESTONE ITEM DUE DATE DUE DATE SUBMITTAL OF BNL LETTER REPORT DN S'TATUS OF REVIEW OF INTERNN. L 2/10/84 EXTERNAL EVENTS (BACK-END REVIEW AREAS) 67

  • STtEF COMMENTS ON 84. LETTER REPORT ON INTERNAL L EXTERNAL EVENTS 3/9 -Si9 STtFF POSITION CN GE PRA SOURCE TERM ASStPPTICNS TO DL aria NOTIFICATION TD GE REGARDING TFE ACCEPTABILITY /UPe4CCEPTABILITY 2/29 -972 -

0F SOURCE TERM PARAMETERS ASSLDED IN GE PRA SLEMITTAL OF BN. FIRST DRAFT' fMEG/CR REPORTS IN INTERNAL &

' EXTERNAL EVENTS ( BACX-Efo) 3/28 4/

MS/35 7 e

SUBMITTAL' CF GE REAN5 LYSIS OF RISK BASED CN ACCEPTABLE SOLRCE 3/5 TERM PARAMETER VALLES *:

SUBNITTAL OF BP4 FINAL DRtFT PGEG/CR REPORTS ON INTERNAL &

EXTERPmL EVENTS (BACX-EPD).

4/16' 5/

SL9M TTAL OF Bt FIRST DRt#~ McG/CR REPORT ON T&E INTEGRATED 3/28 5/3 RISK ASSESS? INT AND SJNARY (FRONT-EPO + BACX-EPC)

STtFF COMMENTS ON ALL DRAFT BM. NUREG/C9 REPORTS 4/3 6/11 DRAFT OF PROPOSED CORoECTIVE ACT!DrG FCR MANAGEt1ENT REVIEW 4/2 s/11 SUdMITTAL OF Btt FINAL DRA T NURES/CR REPORT ON INTEGRATED RISK 4/18 6/20 IPCLUDING BNL ASSESSMENT CF GE SOURCE TERM REANALYSIS DSI/DE FINAL SER INPUTS TO DST ON INTERNAL & EXTERR EVENTS 5/1 S/15 STAFF SER TO DL 6/15 7/9 es SUB.ECT TO AGREE?1ENT BY GE BUT COPPATIBLE WITH BM. SCHEDLLE FOR FINAL INT cca P;Kru5D DATE FOR DST CONSIDERATION ASSLMING COORDINATION OF DST /DSI/DE REPCRTING FCRM4T APO COCPERATIVE JOINT DRtfT REVIEW EFF(RTS 9

6 l

Q% ,_ l

/ o,, UNITED STATES

,.- E' D

n E

NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 205s5 khl I C E .

%*****/ ,

q ll o/pa3'

[( ,

1 M

- l

$3W T 1

MEMORANDUM FOR: Darrell G. Eisenhut, Director Division of Licensing FROM: Themis P. Speis, Director -

D,ivision of Safety Technology

SUBJECT:

HAROLD D'ENTON GESSAR II BRIEFING As requested in your November 1,1983 memorandum, please find attached the GESSAR PRA status and potential problem areas. This memorandum has been coordinated with Divisions of Engineering and Systems Integration for input and concurrence.

Gb Themis P. Speisi Director Division of Safety Technology

Attachment:

As stated cc: A. Ibrahim -

D. Scaletti J. Rosenthal cBr Hardinx J. Read J. Lane 9

q$ ll < 0,

-1.;

  • ~

_ g-:c

^

I. GESSAR-II PRA REVIEW TEAM .

1. DST

, Overall staff technical coordination PRA review up-to core damage ~

(including internal and external events)

Insights and a.tions

2. DSI ,

Accident phenomenology (including containment responses)

Offsite consequences including meteorology y Accident mitigation assessment Source term assessment

3. - '

DE External events Seismic (hazards & fragility)

Fire events Others

4. D t.

Overall project coordination .

Interface with GE -

5. DST /DSI/DE Major considerations in Accident Prevention and Mitigation

II. CONTRACT SUPPORT Brookhaven National Laboratory PRA review (including internal & external events)

Subcontract with Benjamin Associates on seismic

^

(hazards and fragility)

Source' term code support Oak Ridge National Laboratory Offsite consequence analysis 9

e t.

O 4

er*

GESSAR-II PRA REVIEW STATUS IN RESPECT OF THE PROPOSED SEVERE ACCIDENT POLICY STATEMENT ISSUE STATUS REMARKS -

O Demonstrate compliance with GESSAR-II FDA granted Does not include PRA current Commission regulations o Perform PRA PRA review in progress GE uncertainty analyses BNL letter reports reviewed on external events not by staff (DST /DSI) yet submitted (~12/30/83)

Additional information requested from GE O Address USI's (9 Tasks)

  • Not complete in PRA , USI's, addressed in FSAR Work in progress o Address external events
  • GE submitted seismic and fire GE uncertainty analyses on
  • Staff review in progress external events not yet 3 submitted ($12/30/83) o Comply with CP/ML rule (10CFR50.35) ,
  • H 2 control GESSAR-II:not in compliance, Mark-III generic evaluating Staff review in progress program, including cost / benefit

. analysis

  • Provision for containment vent
  • Staff review in progress EPG's instruct operator to vent
  • Containment strength GE will .=odify design to meet tq

. 45 psig limit

. sL: .

j 1 ' sii 1,

'ig

?

3.

1 i

I!

i \

! ISSUE STATUS REMARKS 1 .

i  :

4 j n Accident prevention f

  • Reliable containment heat

. Staff review in progress I removal syctem I

P' o

9 i

I

't l

i

} '

i b

I i

(

(

)

1 I

i

n _. - - .

ISSUE STATUS REMARKS O Accident mitigation - Mark III generic evaluation

  • H 2 control system GESSAR-II not in compliance, program, including cost /

Staff review in progres's benefit analysis

  • Containment strength Staff review in progress ,
  • Filtered-vented containment
  • Staff review in progress
  • EPG's instruct operator to vent
  • Other concepts Staff review in progress
  • RDA & Sandia efforts .
1 o Other research programs
  • ASTP0 In progress
  • Preliminary release by 12/30/83
  • Staff guidance to GE'on source ter's by 1/30/84 o Representativeness of
  • In progress
  • Staff guidance to GE - with j site characteristics for ..

source term guidance by .,;

1 v.

for risk estimators 1/30/84 .

. t.

.e

$5 k 9

+f m,

V  :!

V ".l$ } s. -

i ;/

. 3 '

1 .

III. GESSAR-II REVIEW SCHEDULE TO MEET 5/15/84 SER DATE Scheduled Submitted GE submittal of seismic analysis 10/31/83 09/23/83 (without uncertainty analysis)

GE submittal of uncertainty analysis 10/31/83 11/09/83 on internal events GE submittal of fire analysis and 10/31/83 11/04/83 other external events (without u'ncertainty analysis)

GE submittal of uncertainty analysis 10/31/83

  • on external events Revised source term methodology 12/30/83 from ASTP0 Staff defined source term for 01/31/84 **

use by GE BNL final NUREG/CR 04/16/84 SER to DL 05/15/84 ***

Will be submitted by GE by 12/30/83; this delay may impact schedule, however, we will try to meet the 5/15/84 date. This will be predicated on BNL schedule and timely GE responses which meet the requirements.

If definitive ASTP0 " source term" not available, the staff will go forward using the best information available as agreed upon among appropriate staff and consultants.

      • BNL proposed delivery date is 7/15/84, however, we are negotiating with the contractor to try to meet the 4/16/84 date for contractor report and staff SER on 5/15/84.

r . V , ,.m.r ,... ~ ' T L. . ;,

~

2,/fYd 7w

. . < g l

. s .

IV. LIMITATIONS AND POTENTIAL PROBLEMS GE submitted a single seismic hazard curve enveloping three Eastern U.S. sites. The applicability of the curve and the yet to be submitted uncertainty analysis for any group or location of sites will be limited.

The lack of sit.e specific data regarding subsurface geometry and.

soil properties and their impact on fragility would further limit the applicability of the analysis.

The staff's' conclusions regarding the site consequences are. limited to those sites enveloped by the site characteristics used by GE in their PRA analysis.

We will require GE to document their consideration of alternate . design -

improvements including cost / benefit analyses. "We have informally asked GE to discuss this matter with us. .

Incomplete response to major issues such as USI's in PRA is being pursued with GE for resolution. We expect GE to give this issue high priority to assure that there are no delays in our SER input.

Fire PRA has just been received. Since essentially no review has been done we are not in a position to indicate any limitations or potential problems with the fire PRA. -

Sensitivity of component fragility to core melt contribution does not appear to have been included in the initial seismic analysis.

It is expected that GE's uncertainty analysis shall include this.

l l

r j -

..

Retrieved from "https://kanterella.com/w/index.php?title=ML20101E196&oldid=2775711"