ML17158C174

Summary of 970502 Meeting W/Util in Rockville,Md Re Resolution of Issues Associated W/Use of Thermo-Lag Fire Barriers at Plant,Units 1 & 2.List of Attendees & Licensee Handouts Encl

ML17158C174
Person / Time
Site:	Susquehanna
Issue date:	05/27/1997
From:	Poslusny C NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
References
NUDOCS 9706040195
Download: ML17158C174 (48)

Text

H I

~we TE

'0 ay 27, 1997 LICENSEE:

Penn'sylvania Power 'and Light Company (PP&L) t FACILITY:

Susquehanna Steam Electric Station (SSES),

Units 1 and 2

\\

1

SUBJECT:

MEETING WITH PP&L STAFF CONCERNING THE RESOLUTION OF THERMO-LAG ISSUES AT SSES, UNITS 1

AND 2 On May 2,

1997, NRC staff met with representatives of PP&L.

A list of attendees is contained in Enclosure 1.

The purpose of the meeting was to discuss the schedule that PP&L has proposed for resolution of issues associated with use of Thermo-Lag fire barriers at

SSES, Units 1 and 2; The plans and schedule proposed by PP&L is summarized in Enclosure 2, which is a collection of "slides" used by PP&L during their presentation.

A number of plant modifications are proposed that would result in the resolution of Thermo-Lag issues by the second calendar quarter of the year 2000. 'ssues associated with another fire barrier material, Kaowool, would also be resolved.

This schedule is improved by nearly 10 months compared to the previous schedule.

A brief discussion was held concerning the issuance of a "confirmatory order"'y the NRC.

It was agreed that PP&L would prepare an alternate schedule, if requested by the NRC staff, which could be used by the NRC staff to prepare a "confirmatory order."

Docket Nos.

50-387/388

Enclosures:

1:

List of Attendees 2.

Licensee Handouts (Original signed by)

Chester

Poslusny, Senior Project Manager Project Directorate I-2

'ivision of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc w/encls:

See next page DISTRIBUTION

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 27, 1997 LICENSEE:

Pennsylvania Power and Light Company (PP&L)

FACILITY:

Susquehanna Steam Electric Station (SSES),

Units 1 and 2

SUBJECT:

MEETING WITH PP&L STAFF CONCERNING THE RESOLUTION OF THERMO-LAG ISSUES AT SSES, UNITS 1

AND 2 On Hay 2,

1997, NRC staff met with representatives of PP&L.

A list of attendees is contained in Enclosure 1.

The purpose of the meeting was to discuss the schedule that PP&L has proposed for resolution of issues associated with use of Thermo-Lag fire barriers at

SSES, Units 1 and 2.

The plans and schedule proposed by PP&L is summarized in Enclosure 2, which is a collection of "slides" used by PP&L during their presentation.

A number of plant modifications are proposed that would result in the resolution of Thermo-Lag issues by the second calendar quarter of the year 2000.'ssues associated with another fire barrier material, Kaowool, would also be resolved.

This schedule is improved by nearly, 10 months compared to the previous schedule.

A brief discussion was held concerning the issuance of a "confirmatory order" by the NRC.

<It was agreed that PP&L would prepare an alternate schedule, if requested by the NRC staff,, which could be used by the NRC staff to prepare a "confirmatory 'order."

044, @u Chester

Poslusny, S nior Project Hanager Project, Directorate I-2

'ivision of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos.

50-387/388

Enclosures:

1.

List of Attendees 2.

Licensee Handouts cc w/encls:

See next page

1~

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I I

I II iI

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jl

Hr. Robert G.

Byram Pennsylvania Power

& Light Company Susquehanna Steam Electric Station, Units 1

& 2 CC:

Jay Silberg, Esq.

Shaw, Pittman, Potts

& Trowbridge 2300 N Street N.W.

Washington, D.C.

20037 Bryan A. Snapp, Esq.

Assistant Corporate Counsel Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. J.

H. Kenny Licensing Group Supervisor Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. K. Jenison Senior Resident Inspector U.

S. Nuclear Regulatory Commission P.OS Box 35 Berwick, Pennsylvania 18603-0035 Hr. William P. Dornsife, Director Bureau of Radiation Protection Pennsylvania Department of Environmental Resources P. 0.

Box 8469 Harrisburg, Pennsylvania 17105-8469 Mr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.

212 Locust Street P.O.

Box 1266

'arrisburg, Pennsylvania 17108-1266 Hr. Robert G.

Byram Senior Vice President-Nuclear Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Hr. George Kuczynski Plant Manager Susquehanna Steam Electric Station Pennsylvania Power and Light Company Box 467 Berwick, Pennsylvania 18603 Mr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company Rural Route 1,

Box 1797 Berwick, Pennsylvania 18603 George T. Jones Vice President-Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 Chairman Board of Supervisors 738 East Third Street

Berwick, PA 18603

C (

I E

1

LIST OF ATTENDEES RESOLUTION OF THERMO-LAG ISSUES SUS UEHANNA STEAM ELECTRIC STATION UNITS 1

AND 2 MAY 2 1997 NAME D. Jaffe L. Harsh H. Sallay L. Tran S.

West N. Diaz F.

Emerson T.

Gorman J.

Kenney G. Jones G. Hiller H. Simpson W. Williams ORGANIZATION NRC/NRR

-NRC/NRR NRC/NRR NRC/NRR NRC/NRR PPLL PPLL PPLL PPKL PP&L PP5L PPLL PPLL ENCLOSURE 1

l )

~ l

US Ue R1111R ermO-a eSO Ution

~ A enda Introduction M.W. Simpson, Mgr. Nuc. Tech.

Discussion T.A. Gorman, Project Mgr.

Summary M.W. Simpson, Mgr. Nuc. Tech.

ENCLOSURE 2

ntro uction

~ Background

~ Resolution Strategy

~ Accomplishments

~ Corrective Actions

~ Schedule to Resolve

ntro uotion

~ Dedicated Team Since 1994

~ Supplemented PPkL Staff with Industry Experts

~ Expediting Completion Schedule

~ Committed to Long Term Solution

~ Corrective Actions focus on eliminating reliance on Raceway Fire Barriers

ntro uction

~ Our Goal:

Resolve Issue Expeditiously Ec, Correctly Minimize Plant Safety Risk through

~ Compensatory Actions

~ Careful Implementation of Corrective Actions Complete all work-1999, except

~ Unit 1 Outage Tie-ins

~ Unit 1 Barriers Upgrades Requiring an Outage

ac roun

~ Original Plant Layout Per Reg. Guide 1.75 Physical Plant Arrangement/Layout Separation Requirements

~ Cable Tray 3'orizontal/ 5'ertical

~ Totally Enclosed Raceway 1" Fire Barrier Limitations

~ Existing Raceway Spacing

~ Configuration Specific Qualifications

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~ Appendix R Compliance Efforts resulted in 15,000 L.F. ofInstalled Fire Barriers

~ Current Breakdown ofFire Barriers 85% 1-hour 85'/o Conduit Cable Tray 18", 24", 30" Conduit Sizes 3/4" through 5" Numerous Junction and PullBoxes

RC 1'OU11

~ Appendix R Analysis Revisions Original - $50.0 Million 1985

$25.0 Million 1994

$40.0 Million(Estimated at time)

~ Current Spatial Limitations Dictate Consideration ofAdjusting the Physical Plant Layout

eSO utiOn trate

~ Phase I Walkdowns

~ Thermo-Lag Qualification Assessment

~ Thermo-Lag Safe Shutdown Assessment

~ Original Resolution Schedule was 12/2000

~ Current Schedule pulls this back

ccom is ments to Date

~ Thermo-Lag Resolution

~ NRC IN 92-18 Resolution

~ Safe Shutdown Methodology

~ NRC Interface

~ Industry Participation

ccom is ments to ate

~ Thermo-Lag Resolution Phase I Walkdowns (9/94)

Thermo-Lag Assessment (12/94)

Chemical Ec Density Testing (9/95)

SSD Analysis Rev. (9/96)

Associated Circuits Analysis Rev. (2/97)

Modification Scoping Requests (2/97)

Destructive Examinations (4/97)

ccom is ments to ate

~ NRC IN 92-18 Resolution Revised Control Room Analysis for IN92-18 Concern (4/96)

Responded to NRC Questions on IN 92-18 (12/96)

Completed Unit 1 Modifications (4/97)

Completed Procedural Enhancements (4/97)

coom is ments to Date

~ Safe Shutdown Methodology Responded to NRC Questions on Current SSD Methodology (4/95)

Submitted Control Room Fire Analysis Revision to NRC (8/95)

Developed Spurious Operation Criteria (1/96)

Responded to. NRC Questions on Control Room Analysis (4/96)

ccom is ments to ate

~ NRC Interface Between 12l93 and 2/97 Responded to 6 NRC Requests for Additional Information regarding GL 92-08, Thermo-Lag

ccom is ments to ate

~ Industry Participation NRC/NEI Application Guide Pilot (12/94)

NRC/Industry Meeting on Chemical Testing (3/95)

NEI Info Forum Presentation on Spurious Operation Criteria (1/96)

NEI Info Forum Presentation on NRC IN 92-18 Resolution (3/97)

orrective ctions

~ Eliminate Approximately 7,000 LF

~ Upgrade Approximately 4,000 LF

~ Investigate Approximately 4,000 LF for a Modification Option 125 vdc Modification (2,500 LF)

ESW Control Circuit Reroute (1,000 LF)

Instrumentation Re-routes (500 LF)

~ Changes by 50.59 Process

orreotive ctions

~ Circuit Mods for the 125 vdc modification require a significant amount ofpre-outage work.

Circuit Mods for the 125 vdc tie-ins require significant interaction with critical plant systems.

~ Some Fire Barrier Upgrades willrequire dismantling ofexisting equipment.

I/A 20612

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II/B 20622

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D 2D642

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Attachment No. 2 I/A C

II/B D

1D612 1D632 1D622 1D642

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Elev.771'p to CS Elev.

783'I Zones in U-2 CS Elev 771'own to CS El.

754'nd over to U-1 in I Zones N El.

754'lev.

?54'nter U-2 RB EI.

779'one must be rezoned to II P-L<<e Enter U-2 RB EI.

749'own to CS Elev. 754'n I Zones Enter U-1 RB EI.749'p to CS Elev.

783'nter U-1 RB EI.

779'NIT NO. 2 UNIT NO. 1 U-2 RB El.

749'lev.

749'A201 Distribution Panel ew Distribution Panel Elev. 719'A2 I

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Distribution Panel I

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ew I'w Distribution Panel I

Distribution Panel ew ranser I

ew fans ef Panel I

Panel ew I

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orrective ctions

~

125 vdc Modification Revise approximately 120 voltage drop calculations Major Revision to Safe Shutdown Analysis EQ Qualification on Switches and Breakers Install 6000 LF of4" Conduit Install 24,000 LF of500 kcmil Cable Outage ties to 4kv buses k, diesels

s J

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orrective ctions

~ Fire Barrier Upgrades tight clearancesldifficult access existing equipment removals increased weight requires new supports configuration specific evaluations time consuming

a 1

see Dwg.

XYZ E1K123 BUYER C-1700 SUPPLIER (BUYER REVIEW/

ACCEPT)

Buyer Layout Drawing Plant Walkdowns 4

1 9

5 2

1 Isometric Drawing Good, Sound NRC Rigorous, Balanced Accepted Engineering Testing Approved by a

Qualified Fire Protection Engineer

~

7 8

Installation Detail XYZ Installation Detail Note: Drawing to include Piece Marks where applicable Calculation for lD¹1~ Test 4 and New Fire Test Fire Test Calculation Tests 39 19 $upp for ID ¹4 1.2.3 Ampacity Test IEEE P848 Draft 16 13 Tests Calculation 7,9,17 for ID¹13 and Analysis AirOven Test+ Heat Transfer Analysis, Etc.

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SEGMENT EIKR-09(OI)

SEGMENT EIKR-08(04)

SEGMENT EIKR-06(03)

SEGMENT EIKR"07(03)

~'OARD (TYP)

SEGMENT EIKR-05(02)

SEGMENT EIKR 04 03 SEGMENT EIKR-03(03)

/

TIE WIRE (TYP)

I I

SUPPORT KG"C-APR-083 (SEE DETAIL tl)

SEE DETAIL f2 SEGMENT EIKR-02(04)

PENETRATION X-l2-4-100 CGVEREO WITH CHECKEREO Pl.-

THERMOLAG BUtTS UP AGAINSI PL.~

,EMBEDDED UNISTRUT (KG-C-APR-084)

WITH ANGLE CLIPS.

CLIPS ARE COVERED WI TH THERMOLAG SEGMENT EIKR-0I(0I)

REINFORCED CONCRETE WALL THERMO-LAG BUTTS AGAINST REINFORCED CONCRETE WALL (TYP)

JOINT

( TYP )

/II~6 II WIREWAY HlW e'--

6 N

I 2

SECT2ON A-A

e. JOINT TIE WIRE TIE WIRE I

2 BOARO (TYP)

OETAI'L P2

SEQ4ENT DIP040-22(02)

SEGM9VT DIP040-23(04)

SEMNT DIP040-27 4)

SEQENT Dl 0-28 (02)

SEQKVT Dl 0-29(04)

SEQUENT IP040-32(03)

SEQKVT DIP040-26 (02)

SEGMENT DIP040-24 (02J e SEGi%ÃT DIP040-2I (03)

SEQUENT DIP040-20(02)

SGPKNT DIP040-30(02)

SEGhEÃT DIP040MI(03)

SE(VKVT DIP040-25(04)

SEE DET11L Il pf SEGPHVT DIP040 I9(03)

SEQ~ DIP040-IS (02)

SG~ DIP040- I6 (02J SE(a+MT DIP040 I7(04)

ENT(RE B' e"'g)T gp+sfv s'~

iRITY PK4VY TRONELINC hO VISIBLE HIRES IO VISIBLE SWESS SK2N

.'@QUENT DIP040" l5(OIJ GROUTED PEhETRA TIOM

4

C JOINT (TYP)

SECTION A-A

~

k J

JOINT HEA VY TROh'ELING JOIN T

c e ueto esove

~ Outage Planning Cycles Designed for orderly performance ofwork that assures safe plant operation

~ Outage Adjustments

~ Adjustments being pursued Test the Current Limits ofPlanning Assure Safe Operation ofthe Plant

uta e

annin

~ AllModification work identified 18 months prior to outage start.

~ AllEngineering for non-outage work released 9 months prior to outage start.

~ AllEngineering for outage work released 6

months prior to outage start.

~ Process assures all work performed on the unit is planned and safely controlled.

uta e

ustments

~ One less Outage Available than Originally Planned

~ Final Completion Compressed from 12/2000 to 4/2000

~ MajorityofWork Completed by 12/1999

ustmentsto o e ue

~ IN 92-18 Modifications Unit ¹2 Completed

~ IN 92-18 Modifications Unit ¹1 10 RIO

~ Thermo-Lag Non-Outage Corrective Actions - End ofyear 1999

~ Thermo-Lag Outage Corrective Actions Unit ¹1 11 RIO (April2000)

. ~ Diesel Outages Adjusted When Required

1995 1996 1997 1998 1999 ID Task Name 1

Phase I Waikdovms 2

Thermo-Lag Assessments Duratio 128d Start 9/27$ 4 9/27 n giig 1ns Finish Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 3

Chemical & DensityTesting 4

Revise Safe Shutdovm Analysis 5

Revise Assoc. Circuits Analysis 6

Perform Destructive Exams 7

Perform Engineering 110d 1054d 11/1 $6 9/1/95 9/15/96 9/7$6 9/10/99 3/27 9/15 e4~ n 11/1 giiI4 10 Perform Preliminary Eng'ng Perform Mod Scoping Prep. DCPs 215d 9/1$5 12/1/96 5/30/97 9/25/97 9/10$ 9 6/30 12/1 IQ~~ 8/25 8/10 12 Install U2 11 IN 92-18 Modifications 277d 3/15/97 3/15/97 4/3/98 4/19/97 3I15 I 4/19 13 Install U1 21d 3/7 g 4/3 14 125 vdc Modification 508d 5/1/98 4moo 16 17 Install U2 Preoutage Install U2 Outage (U2 9)

Install U1 Preoutage 21d 211d 1/31/00 5n~~ sn2 3/13 II 4/9 4n2 1/31 18 19 Install U1 Outage (U1 11)

D/Gs Tie-Ins 21d 3/11/00 9/1/99 311 g 4 9n ~~4 20 ESW Modification 21 Install Div I - A & C Pump 22 Instrument Modification 282d 282d 508d 3/13/99 3/13/99 5/1/98 4moo 4moo 23 24 Install U2 Install U1 247d 261 d 5/1 4n2 25 Fire Barrier Upgrades 508d 5/1/98 4moo 26 27 Unit 2 Upgrades Unit 1 & Common Upgrades 247d 261d 5/1/98 5/1 4n2 4/9 Page 1

~

L

~

t-A,

~ Significant Issue for SSES

~ Must be Resolved Correctly

~ Corrective Actions Are Complex 0 Very Expensive

~ Schedule is being Expedited

. ~ Station Risk is being Minimized