ML20236X894
| ML20236X894 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 08/07/1998 |
| From: | Howell A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gambhir S OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 9808110004 | |
| Download: ML20236X894 (59) | |
Text
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ga '%g y g UNITED STATES
, y ,cc g NUCLEAR REGULATORY COMMISSION s REGION IV 3, 611 RYAN PLAZA DRIVE. SUITE 400
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V ARLINGTON TEX AS 76011-8064 g _7 g 1
l S. K. Gambhir, Division Manager Engineering & Operations Support Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.
P.O. Box 399 Hwy. 75 - North of Fort Calhoun l Fort Calhoun, Nebraska 68023-0399
SUBJECT:
SUMMARY
OF MEETING WITH NRC AND OMAHA PUBLIC POWER l DISTRICT-JULY 10,1998 l l
Dear Mr. Gambhir:
A management meeting, open to public observation, was held on July 10,1998, at the Omaha Public Power District's Fort Calhoun Station. The meeting was conducted to discuss Omaha Public Power District's approach to the conduct of the planned switchyard upgrade project. The meeting attendees are listed in Enclosure 1. The documents used in Omaha Public Power !
District's presentation are provided in Enclosure 2. i During the meeting, Mr. Gary Gates, you and Omaha Public Power District presented the factors which contributed to the decision to initiate the switchyard modification project, including the impact of deregulation on Fort Calhoun Station. The overall scope of the transmission and distribution grid upgrade, the existing switchyard controb, and the planned integration of Fort Calhoun Station personnel oversight of the switchyard project were discussed. Ir. addition, Omaha Public Power District's presented the probabilistic risk assessment insights, which had been gained, as well as, a summary of the efforts planned to manage the plant and switchyard project integrated risk.
Omaha Public Power District identified that the impact of deregulation on Fort Calhoun Station, general load growth and a need to upgrade the transmission and distribution grid system necessitated the upgrades. The transmission system upgrsJes will provide two additional 345/161 kilovolt autotransformers for generation output and station service power. This should improve transmission system reliability and stability as well as increase voltage support.
Omaha Public Power District identified that the s'nitchyard controls would be consistent with the existing procedural controls, which required station approval before work in the switchyard can be performed. Access to the switchyard would be restricted and isolation fences would be established for areas where personnel do not need access for the switchyard upgrade. Design engineering has dedicated an individual to coordinate the work and ensure the plant personnel would be appropriately informed of the work being planned and ongoing, which could effect Fort l Calhoun Station's operation. The associated switchyard modification design package has been reviewed by the System Modification and Review Team and the Plant Review Committee.
9808110004 980807 PDR ADOCK 05000285 P PDR J
Omaha Public Power District l l
l A verification matrix hac been developed to compare the Fort Calhoun licensing and design basis requirements with the construction work segments to ensure their compliance. The use l
of this matrix would include probabilistic risk assessment and would be used to identify problems and methods to accomplish the work within the plant requirements. Probabilistic risk l assessment insights have been developed which identified risk important components and operator actions. A loss-of-offsite power initiator model was being developed to better reflect changes in the switchyard configuration.
I The discussions during the meeting were helpful in understanding the overall scope, and l management controls and insights which have been developed in planning for the switchyard upgrade project The discussions re:nforced the benefits from early communication between Omaha Public Power District and the NRC for those evolutions of greater risk or those whien I
could lead to a unit being in an unusual operating condition.
Sincerely, h Arthur T. Howell111, Director
, Division of Reactor Safety Docket No.: 50-285 License No.: DPR-40
Enclosures:
- 1. Meeting Attendees
- 2. Fort Calhoun Station Switchyard Upgrade Project Handout cc w/ enclosures:
James W. Tills, Manager Nuclear Licensing Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.
P.O. Box 399 Hwy. 75 - North of Fort Calhoun Fort Calhoun, Nebraska 68023-0399 James W. Chase, Manager Fort Calhoun Station P.O. Box 399 Fort Calhoun, Nebraska 68023 Perry D. Robinson, Esq.
Winston & Strawn 1400 L. Street, N.W.
Washington, D.C. 20005-3502
Omaha Pub'ic Power District Chairman
- Washington County Board of Supervisors Blair, Nebraska 68008 Cheryl Rogers, LLRW Program Manager Environmental Protection Section Nebraska Department of Health 301 Centennial Mall, South P.O. Box 95007 Lincoln, Nebraska 68509-5007 l
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Omaha Public Power District -4 bec to DCD (IE45) bec distrib. by RIV:
Regional Administrator DRS-PSB DRP Director MIS System Branch Chief (DRP/B) RIV File Project Engineer (DRP/B) Branch Chief (DRP/TSS)
Resident inspector i
I DOCUMENT NAME:' R:\ _FCS\FC710mt.wbj To receive copy of document, indicato in box: "C" = Copy without enclosures "E" = Copy with enclosures "N" = No copy i RIV:DPS/SRA C D:DRSM ,
! WBJones/Imb M ATHowlllili 08/06/98 0 08/p98 OFFICIAL RECORD COPY i
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' Omaha Public Power District bec to DCD (IE45) bec distrib. by RIV:
Regional Administrator DRS-PSB DRP Director MIS System Branch Chief (DRP/B) RIV File Project Engineer (DRP/B) Branch Chief (DRP/TSS)
Resident inspector 1
1
- DOCUMENT NAME
- R:\ _FCS\FC710mt.wbj To receive copy of document, Indicate in box: "C" = Copy without enclosures *E" = Copy with enclosures "N" = No copy RIV:DPS/SRA C D:DRSgf WBJones/Imb M ATHow711111 h 08/06/98 0 08/;/98 OFFICIAL RECORD COPY ;
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ENCLOSURE 1 MEETING ATTENDEES l
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OMAHA PUBLIC POWER DISTRICT FORT CALHOUN STATION MEETING ATTENDANCE LIST
SUBJECT:
Evblic Meetina Date:_0ZL10291_
FCS Switchyard Uoarade _
Name Title / Telephone (Please Print) Organization Extension x]Lm e.s WYoh) Arso / ~ /Vu br'ccosInf bSh$
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ENCLOSURE 2 FORT CALHOUN STATION SWITCHYARD UPGRADE PROJECT HANDOUT
Fort Ca30un Station Switchyard ~pgrade Project L * -
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Omaha Pulic Power District July ~ 0, ~ 998 .
l Omaha Public Power District I
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Gary Gates
- Introduction and Opening Remarks l
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Omaha Public Power District 2 j
Agenda llll m Introduction - G. Gates u Impact of Deregulation on FCS - G. Gates a T&D Grid Upgrade Project - D. Witt u Existing Switchyard Controls - J. Goodell e OPPD Organizational Controls
- FCS - S. Gambhir
- T&D - D. Jackman .
m FCS Switchyard Upgrade - L. Troutman m FCS Design Control - J. Connolley a Risk Assessment Insights - A. Hackerott l m Closing Remarks - G. Gates Omaha Public Power District 3
~
Impact of Deregulation on FCS M HHil m Status of Legislation in Nebraska m Impact of Market Conditions I
i e OPPD's Response i
Omaha Public Power District 4
I ml OPPD Transmission and.
Distribution Grid Upgrade l Dan Witt
(
f Omaha Public Power District 5
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Transmission System Proposed Modifications (
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F T. CALHOUN NUCLEAR
- ES POWER STATION g an y E % 3451/1251 E r E
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- ENNARD m i FT.CALHOUN
- -- N l E 1297 E
E W HINGT 014
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E BENNINGT Ni 1250 g , , MID AMERICAN g i252
- ENERGY CO.
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(SITE)r1 ,, p a n a, m i
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l Omaha Public Power District 10
4 Drivers for Change HIl
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m General Load Growth a Deregulation, Open Access m General Need to Upgrade the System l l
i Omaha Public Power District 6
Transmission System 1973 to 1995
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F T. CALHOUN NUCLEAR
- POWER STATJON 3
ggg 3451/1251 1
KENNARD S '
FT.CALHOUNh I I Wt SHINGTON (
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BENNINGTONl 6 1250
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- ENERGY CO.
937 l ELKHOR -
UU 1253
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Omaha Public Power District 7
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Transmission System 1995 to Present m.
1 1 IEEO ~f F T.CALHOUN NUCLEAR POWER STATJON ggg 345 us251 KENNARD
- FT.CALHOUN
'1297 W/ SHINGTON (
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BENNINGTONI 1250 l W
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? 1252 ENERGY CD.
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Omaha Public Power District 8
I 1-Existing 345161k Yard ;
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M M 3431(3 6 V)*10 h h OT1!Pl5 to g Sb J L ftir 1h 1218 (ab1225 5 i.---. j
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- 191kV l- l 1
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CKT304(36V)to E 6 5 4 36V
! I i M 3422( M
, to m h a b 3451
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ws
\ Fort Calhoun 30 , g7 Statio n
- - - l 112 . , , , , , til , , ,,,,, Im , !
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gyg El Wto TLO &4 161kV i l l ,
3GV 041!B4toi410(&b12D) Ma&b 1297.R. Cal Town i l Omaha Public Power District 9 a
OPPD Transmission System Summary of Upgrades Before 1995 Today After June 1,1999 3 - 345 kV 3 - 345 kV transmission 3 - 345 kV transmission lines for generation transmission lines for generation outlet lines and l outlet 2 - 345/161kV autotransformers will provide for generation outlet
, l 1 - 161 kV 2 - 161 kV transmission 3 - 161 kV l transmission line lines provide station transmission lines I provided station service power and service power 2 - 345/161 kV l autotransformers (same as above) will provide station service power Fast Transfer No Change No Change
! Scheme covered loss of source to FCS 4160 V Busses Omaha Public Power District 11
8 OPPD Transmission System Summary of Upgrades EEHHil mIncreasec Reliability mIncreased System Stability I
mIncreased Voltage Support i
Omaha Public Power District 12
o HIl Existing Switchyard Controls J. ' Woody' Goodell i
l Omaha Public Power District 13 !
i Switchyard Controls HIl m Objective of Switchyard Controls
- Minimize potential for inadver:ent Loss l
of Offsite Power or Station Trip due to l error occurring in the Switchyard.
m All Activities Require Station Approval (SS), Proceduralized in NOD-QP-36 and OPD L-12
- Prealanned Activity
- Periodic Inspections
- Emergent Wori
- Emergency Wori Omaha Public Power District 14 1
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Preplanned Switchyard Activities
.: Hil Pre-planned activities identified
' r 3r Reviewed by System and Reviewed Ops 4
YES YES 1 r
" Approved by FCS" on POD l ,r Entered into
, Switchyard Activity Book i
Omaha Public Power District 15 j l
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Switchyard Controls (SS approval required)
HH m All Requests Consider:
- Circuits / Components Involved
- Work Scope and Impact on the Station
- Potential Risks
- Ability to Bypass Potential Trips
- Potential to Defer Work to an Outage
- Duration of Work Omaha Public Power District 16
i Switchyard Controls (SS approval required)
- Hll \
i m Other Controls
- Authorized Persormel Are Trained on NOD-QP-36 Requirements and Industry Operating Experience 1
- Approval Required Prior to Entering Switchyard
- Key Carded / Alarmed Gate
- Entries and Exits Logged
- Duty Su3ervisor Tours
- Peer Checking I
)
Omaha Public Power District 17
Summary HHil m All Switchyard Work Is Ultimately Controlled by the Shift Supervisor m Through XOD-QP-36 Switchyard Activities Are Controlled a Controls Are Effective m The Additional Construction Controls Will Minimize tae Possibility 0::~ Loss of Offsite Power Omaha Public Power District 18
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FCS Oversight of l Switchyard Project Sudesh Gambhir
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Omaha Public Power District 19
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OPPD Transmission System Summary of Upgrades
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l Before 1995 Today After June 1,1999 )
3 - 345 kV 3 - 345 kV transmission 3 - 345 kV l transmission lines for generation transmission lines for generation outlet lines and outlet 2 - 345/161kV autotransformers will provide for generation outlet
- 1 - 161 kV 2 - 161 kV transmission 3 - 161 kV transmission line lines provide station transmission lines provided station service power and service power 2 - 345/161 kV autotransformers (same as above) will provide station l
service power Fast Transfer No Change No Change Scheme covered ;
loss of source to l FCS 4160 V Busses Omaha Public Power District 20 l
Design Coordination y sgg m Dedicated Individual From Design Engineering (FCS Project Engineer, J. Connolley) m Using PRA Insights to Review Design Concept a Consistent With FCS Design Basis l l
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Omaha Public Power District 21 L-__-__--.-_- _ ___ _--_ _
Design Interface HIl m Design Package Reviewed by FCS Staff (will Address Impact on FCS Electrical Distribution System)
- System Modification and Review Team (S MART)
- PRC l
l Omaha Public Power District 22
I Construction Interface t IHil m Xo Construction Work was Scheduled During the 1998 RFO m FCS Operations Staff will Maintain Ultimate Control of Substation activities m Additional Training for Operators to Raise Awareness l
I Omaha Public Power District 23
Construction Interface ggy ,
m Use ofIndustry Operating Experience and Briefings l m Management Observations and QA l Surveillance I
Omaha Public Power District 24 l
Summary l IHil 7
m Positive Control of the Switchyard Will Be Maintained by Operations Management m Design Engineering Will Be Actively )
Involved to Ensure Safety and ;
Regulatory Compliance l
u Construction Controls Will Minimize Any Po:ential for Error Omaha Public Power District 25 t
4 M EHil Organizational Control of the Project T&D 1
Dan Jackman Omaha Public Power District 26
T&D Organizational
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Controls
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. jll m Design
- Hired Black & Veatch to Provide Design.
- All Design Is Under the Direction of OPPD Project Manager.
- The Design Will Mee, the Following l Requirements:
l Ft. Calhoun Station Requirements l
OPPD T&D Design Requirements National Electrical Safety Code i
Requirements i
Omaha Public Power District 27 1
T&D Organizational
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Controls
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E' -lHl m Construction Management
- Hired Black & Vea::ch :o Provide Coordination and Inspection '
- Housed in the Ft. Calhoun Administration Building:
Project Manager for All Projects
- Key Construction Personnel to Be Trained on NOD-QP-36 Requirements
- One Su3 station Insaector Will Be l Located in Contractor Trailer to Assure l Contract Specifications Are Met.
l - Equipment Q.A. Inspectors As Required Omaha Public Power District 28
T&D Organizational i Controls y .
g a Construction Management
- All Phases of the Project Will Be Scheduled to Show Specific Activities Being Performed
- All Aspects of the Project Will Be Communicated and Coordinated With Ft. Calhoun Sta:??
Daily (Today's Activities)
Weekly (Next Week's Plan)
Monthly (Status Report)
- Physical Barrier Between Active !
i Switchyard and Construction Area
- AllInsaectors Will Be Instructec to Enforce All Safety Requirements Omaha Public Power District 29
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. Ill l
Ft. Calhoun Station !
Switchyard Upgrade i
Larry Troutman Omaha Public Power District 30
4 Existing 345161k Yard ,
I m ---_-_--
071!B5 to Balr U
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. ( 2 1224 %
Jk l
1etkv" I
i 073G4(342kV)to E 6 5 4 345kV T
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l 073C2(34tkV) toQnde l
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I cargill
- 107S 7 7 1
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in 161LvtoTtu &4 "
161kV 161kV 34!kV 071584toHill0(%12!D) @h 1297.R.CW Town 1
31 l Omaha Public Power District i
t
e FCS Switchyard ~pgrade '
l NORTH j ( CKT 3431 to Raun CKT 1585 to Blair (Sub 1226) Jk SmV carellt. Sub 298 '
CKT 1588 CKT 3424 to LES 345kV 181kV
- E B--E CKT 3422 to Om sha 2 346kV ' 345kv Sub 3451 181kw Sub 1261 CKT 1570 NEW LINE to Blair (Sub 1226) 161kV C alho en 5 es tie a 161kV T1 A3 & T1 A4 j g 181kV 181kV CKT 1584 to I 680 (Sub 1250) 345kV via Sub 1297 Ft. CalTown
, . New Com ponents . Replaced Com ponents . Existing Com pone nts Omaha Public Power District 32 1 w_____.______.__________ - . _ _ _ _ _ _ . _ _ _ _ _ _ _ - -
. 1 l
Example 1 Construction Step 3/3 to 3/12/99
. Ill Substations 3451/1251 ,_
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GEN
- 1 F 1# M'H x qs -
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L{ Lne-/ILard i i u
Qu g W , Hni-/ Ming # g 05n K
H )USE
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Omaha Public Power District 33 l
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Hil FCS Design Control Joe Connolley Omaha Public Power District 34
Verification Matrix
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)
m Matrix Will Formally Compare FCS Licensing and Design Basis Requirements Vs Construction Work Segments to Ensure Compliance
\
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Omaha Public Power District 35 1
s Sample verification Matrix l
C on struc tion P h as e 1 C on struction P h as e 2 l (T e n t a tiv e ) (T e n ta tiv e )
Fort Calhou n Statio n License and Design l Bases e Ckt 1584 FCS to 1680 O UT
- C kt 1584 -lN
- W est Bus O UT e W est Bus IN l Re q u ire m e n ts e C kt 1588 F C S C argill - lN
- 109 & 111 - CLOSED e 109,111 & 112 O P EN e C ontin u e 112 R eplacem ent
- 345 kv S ystem -IN e Replace B kr 112 1
S tatio n Blacko ut C riteria -
e Line S pacing 1m i. from FC S e
l e -
l USAR e 1.2.7 - G e neral E le ct. S ys tem e 8.1 - E le c tric a l S ys te m e 8.2 - Netw ork interconnection .
e 8.3 - S ta tio n D is trib u tio n e 8.4 - Em ergency P ower TECH SPECS. I e 2.7 - T 1 A 3 & T 1 A 4 O p e r a bility {
e 2.14 - E m e rg. B u s Lo Vo lt a g e e 2.15 - O P L S ,
I
. I Design Basis e S ystem Planning Load Flow S tu die s
- E ngineering An alys es
- C a lc u la tio n s l
P R A RIS K A S S E S S M EN T I
Omaha Public Power District 36
Matrix Inputs
'y gglll m Load Flow Studies Ensure Adequate l Voltage Available to FCS Safety Busses l
! m Station Blackout Requirements Met Ender All Work Segments l m TS, L SAR and Other Design and Licensing Document Requirements a Probabilistic Risk Analysis Omaha Public Power District 37
10CFR50.59 Review
' .~ EHil n 10CFR50.59 Review to Further Verify Compliance a Will Be Done for Each Construction Work Segment Ornaha Public Power District 38
Problem Identification lllll m Matrix and Analysis WillIdentify Problems and Other Methods to Accomplish Work Segments That Are Within Plant Requirements l
l m Recommendations to Management for Problem Resolution Omaha Public Power District 39 l
Pre-Construction Issues HIl m 161kV/345kV Crossovers by New 161kV Line
- Identified by Informal Matrix During Interdepartmental Meetings l - Resolved by Rerouting Line m Proposed "H" Frame Extension
- Potential for Pile Drilling Inc uced Vibration to Actuate Relays
- Modified Design to Eliminate Neecffor I Extension Omaha Public Power District 40
l I
Pre-Construction Issues Mm IHil ;
m Addition 0: PCapacitors at Cargill Substation
- L,oad Flow Study for FCS 161 kV Radial Feed Indicates Potential Low Voltage Without Capacitors
- To Be Installed Prior to the Start of Construction (Early August 1998)
Omaha Public Power District 41
Other Issues lllll m Temporary Fences to Isolate Energized Switchyard Equipment From Construction Areas m Xo Switchyard Upgrade Project )
Work During the 1998 Refueling Outage l
Omaha Public Power District 42
Communications HHil m Per Established Plant Procedures m Construction Segments Will Be Communicated to Plant Staff to Clarify Changes in Switchyard Configuration on a Daily Basis !
l Omaha Public Power District 43
Positive Impacts H H il u Increased 161kV System Voltage j u Greater Flexibility and Reliability of 161kV and 345 IV Systems Due to Full Breaker and a Half Scheme m 3 New 161kV Sources Will Provide an Inherent Increase in 161kV System Availability and Dependability Omaha Public Power Districi 44
9 ggy PRA INSIGHTS Alan Hackerott l
l Omaha Public Power District 45
9 i
PRA INSIGHTS '
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H il ,
m FCS Overall CDF Is Low e The LOOP Initiator Is a Dominant l Contributor l
u Key Plant Features Minimizing the l Impact of LOOP
- Two Self Cooled EDGs l
- RCP Seals
- PORVs Not Challenged on LOOP Trip l
- Three Independent and Diverse AFW Pumps (Electric, Turbine & Diesel Driven) 1 Omaha Public Power District 46
PRA INSIGHTS Hlllll m With a LOOP Frequency of As High As 1/Yr, CDF Would Be Below XRC Subsidiary Objective u With Effective Configuration Management, CDF Impact From Construction Can Be Limited Omaha Public Power District 47
LOOP RISK MANAGEMENT ;
IHil I m Relatively Few Systems ::nvolved:
- EDGs 1
- AFW
- HPSI >
- DC Power u Key Actions:
- Recovery of Offsite Power
- Refill of EFWST
- Control of AFW Flow
- Battery Load Shedding Omaha Public Power District 48
Summary to Risk Management IHil m Developing LOOP Initiator &
Recovery Model Capable of Reflecting Changes in Switchyard Configuration For Incorporation Into PSA Model m Provide Feedback to Switch-Yard Projec1: on Risk Impacts l m Increase Operator Awareness of Key Actions During LOOP Omaha Public Power District 49
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Hil Closing Remark.s i l 1 l
l 1 Gary Gates i
Omaha Public Power District 50
< _ _