ML17199R316

Summary of 870730 Meeting W/Util in Rockville,Md Re Nutech Mark I Piping Configuration Verification Program Being Used at Dresden & Quad Cities.List of Attendees Encl

ML17199R316
Person / Time
Site:	Dresden, Quad Cities, 05000000
Issue date:	08/05/1987
From:	Ross T Office of Nuclear Reactor Regulation
To:	Muller D Office of Nuclear Reactor Regulation
References
NUDOCS 8708110161
Download: ML17199R316 (4)

Text

r,

-Distribution:

.£~~-t'fCentra 1 _ Fi 1 e MEMORANDUM FOR:

• FROM:

SUBJECT:

Daniel R. Muller, Director Project Directorate III-2 AUG 0 5 1987 Division of Reactor Projects-III,!

IV, V and Special Proje~ts Thierry Ross, Project Manager Project Directorate III-2 Division of Reactor Projects-III, IV, V and Special Projects

SUMMARY

OF MEETING WITH CECO ON PIPING CONFIGURATION VERIFICATION. PROGRAM FOR QUAD CiTIES AND DRESDEN Commonwealth Edison Company (CECo) held-a meeting in Rockville with-NRR* and Region II I staff on Thursday, July 30, 1987 to present and discuss the NUTECH Mark I Piping Config~ration-Verification Program being used at Dresden (2&3) and Quad Cities (1&2). -Meeting attendees are identified in Enclosure 1.

The meeting agenda.. r.~garding Piping Configuration Verification Program went as fol lows:

o

_Introduciio~;

o _ Brief Hi stori ca 1 Backgr:ound o Overa 11 Program Descr,i pti on and Logic Diagram

-o Status (Including Majo~ Milestones)._

o Purpose, Method an~ Bases of Second Level Screening Criteria (Including Llse of WRC-316 for Mark-I Piping) o *Purpose, Method and-Bases of Operability _and FSAR Compliance Criteria _

Copies of overlay projections shown at the meeting have not been attach~d, but _

are available from the Quad Cities PM.

At the time of this.meeting, CECo had completed the second le~el screening of a 11 354 discrepancy di'sposition reports (DDRs) _generated duri_ng -program wa 1 k-downs at' Quad Cities and Dresden.

Of which, only five (plus thirtee.n other inter-related DDRs) were determined to require-formal as~_essment (i.e*.,_ compu.ter code re-analysis of entire piping system model) for verification of Operability/FSAR compliance.

Formal assessment of these five piping models

• a7oa11i0161 a7oaos '.

PDR

~DOCK 05000237 p

- --- P_D~~

Daniel R. Muller 2*

AUG O 5 1987 (i.e. ECCS, RHR, HPCI and Pressure Suppression) are schedul~d for completion between 8/3 and 8/17. All other DDRs are being processed for FSAR compliance using acceptance criteria or tolerances rather than formal assessment.

Approximately seventy of these have already been determined to comply with FSAR allowables (none have failed to comply so far), the rest will be completed by November 9, 1987.

After closed deliberation during the later part of the meeting, the NRC staff came to the following conclusions which were discussed at length with CECo:

o Operability stress criteria are apparently acceptable based on past precedence.

• o Second Level screening criteria using twice.the values spe~ified in WRC-316 was not an appropriate method.

However, due to advanced stage of the program and near term completion*of FSAR co~pliance

~valuations and operability analysis, these screening criteria *will be *considered acceptable for this specific application only.

o NRR will evaluate NUTECH document CEC-99-017, Revision 2, "Piping Configuration Verification - Operability of FSAR Compliance Criteria" for consistency with accep~ed ~tandards

.and practices.

By August* 14, 1987 an NRC position will be developed addressing applicability of this document.

It was the final NRt consensu~~*that generally, th~ overall Piping Configuration Verification *program appears sufficient *to identify a.nd resolve inadvertent

• discrepancies discovered between the as-built and as-analyzed Mark I torus attached piping at Quad Cities and Dresden.

Attachment:

As stated.

l:>aniel 1R. Mulle'r Thierry Ross, Project Manager Project Directorate III-2 Division of Reactor Projects-III, IV, V and Special Pro~ect~

\\

lOFC

PD I I 1-2 I

---

:----------------~_;V'~,(./~--------------:--------------:--------------:-----~-------

NAME

TRoss ~

.. *.pu;/

---

:----------------:-~ ~--------:--------------:--------------:~-----------~-:-------~-----

DATE

8/ 5 /87

*. --*r;r7

~

Distribution:

-;pocket FiJ e/

NRC & L*oca 1 PDRs PD I II-2 r/f TRoss OGG-Bethesda _

EJordan JPartlow NRC Participants ACRS (10)

HBC lay ton *(Region I)

A'lTENDANCE SHEET NRC E '

zc Meeting Name Company

/C ZiJ""

UNITED STATES N.AR REGULATORY COMMISSIOI REGION Ill 7H *OOHvtLT ao40 C&L&N &LLVN, ILLINOIS *ou1 Date:

Ti.me:

• File No:

Position I.

3 ~~o~~~~G_*_u_'~--~**~~~-+~--'"~V_fZ

__ L_.... -=--P_t~..S~~=-====t--===~-r_._fi_~~e_v._~-~~**~_~_r_C_**-~~\\_**_r.. _lj_:.

'I H A-Ff_-r -z_ M ArJ s Af IA/ [ ()v../ M,(J!,

~ :r:.lv1 J s JZ. J. $-rQ.~0~ t..-i_

?:::; < rc-'L

'i 13. ::}""_ \\J\\h.~ l I

-:. \\*

~.

to_!/_/?. /1/f VL L 6;::2...

yf

/)

,, /

n7. /<:.c: > 5 n-.:::r~. As~1

u. /?,c_r_ H /Je...-oc.._HA.} A

'" D.. L. w*,l c:.l5 Ii

, s I\\.. E,.- L 1 P 1 N *s '< c tJ f?-.c( /J/2-(L De>:.-r/MJE~

{'[~- Afttf£tfl l\\l l1T f::C.W l'--l l..A--C...t..<;-1J _ <:-Ee-=_.

/\\//f'C

( 11t<..R)

Sv. ll-1~ *E

£9,. v1 ~

fl2ES IPa.Lr

.~ 't..c.. L\\c:....

~

NUC!. L\\~. A~

iC\\l t~TOJ(

/

>---?

. c-

/<:: O'v* C

/

B µ) R. µc;,-, -.s l..(9E.AVl.S/IV~ EA)

.!>W'K 6". '

k -

G..... '......:.~

CIVIL eN.<<-.