M140106, M140106B: Scheduling Note and Slides - Briefing on Flooding and Other Extreme Weather Events. Part 1 of 2

M140106B: Scheduling Note and Slides - Briefing on Flooding and Other Extreme Weather Events. Part 1 of 2

ML14008A340
Person / Time
Site:	Salem
Issue date:	01/06/2014
From:	NRC/OCM
To:
References
M140106B
Download: ML14008A340 (63)

Text

COMMISSION BRIEFING SLIDES/EXHIBITS BRIEFING ON FLOODING AND OTHER EXTREME WEATHER EVENTS JANUARY 6, 2014 In the Eye of the Hurricane:

Super Storm Sandy PSEG Nuclear Preparations, Impacts and Lessons Learned Robert DeNight Operations Director Salem Generating Station 1 Salem and Hope Creek Generating Stations 2 Forecast vs.Actual eForecasts on October 29th at 6 pm called for:-Additional rainfall of another 1/4-Winds through midnight will be 30-45 mph with gusts of 45-65:Yy)4 sustained at mph-Overnight winds will be sustained at 15-30 mph with gusts of 30-50 mph-Storm surge will be 3-6' and will peak around midnight.morning Storm surge should recede by mid 3 Forecast vs. Actual Actual weather from landfall at 8 pm through the early morning-Rainfall was consistent with forecast Winds through the evening were 40-60 mph with gusts upon landfall of up to 90 mph Winds were sustained through the night precluding storm restoration to begin until 7 am Storm surge ranged from 11-13.6', causing widespread flooding and devastation to the region 4 PSEG Nuclear Unit Status e Hope Creek 100% Rated Thermal Power e Salem Unit 1- 100% Rated Thermal Power* Salem Unit arrival): 2 (two days prior to Sandy's-Defueled, Full Core offload, in Spent Fuel Pool-Defueled Mid Loop-Single Source of Off-site power-Major Equipment OOS* 2B Emergency Diesel Generator, 2B Vital Bus OOS* 2B 125V DC batteries* 21 SW Nuclear Header 5 Salem and Hope Creek Flood Design HOPE CREEK 134 Fr- SI3VICE WATER 132 FT- DIESEL INTAKE SALEM 127 FT -SERVICE WATER 126 FT -DIESEL IN'TAKE DESIGN BASIS 120 FT HIGHEST LEVEL 97.5 FT SITE GRADE 100 FT¶NORMAL 89FT I Category 1 74- 95 MPH Category 2 Category 3 Category 4 Category 5 96-1... MPH 111 -130 MPH 131 -155MPH> 155 MPH 0 0 0 0 6 Salem and Hope Creek Shutdown Criteria* IF AT ANY TIME the river level is >98.5 ft, THEN INITIATE actions to place the Unit in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in Mode 5 within the next 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.* IF hurricane force winds are imminent, THEN INITIATE preparations such that the Unit is in Hot Standby (Mode 3) at least two hours prior to the projected arrival of hurricane force winds.7 Salem and Hope Creek Emergency Action Levels (EALs)* Unusual Event (UE)-Delaware River level reaches 99.5 feet at Salem units, 99.5 feet at Hope Creek-Average Wind Speed >95 mph for any elevation* Alert -Escalation with UE conditions-Visible damage to Safety Related Structures 8

Implementation of Severe Weather Guidelines

-Phase 1 (T-3)Operations

-Inspect station blackout equipment-Verify remote shutdown panel communications

-Indication and switch alignment-Hope Creek blockhouse sump pump staged 9 Implementation of Severe Weather Guidelines

-Phase 1 (T-3)Maintenance Protect spare equipment required for recovery Inspect/remove/secure outside areas for potential missiles-Staging of sump pumps and sandbags-Availability of emergency supplies like flashlights, potable water, etc.10 Implementation of Severe Weather Guidelines

-Phase 2 (T-2)* Site walkdowns° Verifying water tight doors" Emergency diesel generator availability" Return Major Plant Equipment for Shutdown Safety" Ensuring water intakes prepared for severe weather* Address potential staffing requirement 11 Staffing requirements Only essential personnel req'd to report-Specific responders from two ERO teams-Operations Support Center (OSCs)-Technical Support Center (TSC)-Emergency Operations Facility (EOF)12 Implementation of Severe Weather G uidelines-Phase 3 (T-0)-Close watertight doors-Relocate personnel-Implement preplanned sandbagging

-Relocate vehicles to shelter-Establish Fire Protection command post-Complete various Service Water Bay penetration repairs 13 Superstorm Sandy impacts" Hope Creek -Remained at 100%, HC output greater than demand on PJM" Salem Unit 1 manually taken offline at 1:09 am (5 day forced outage)-Four of the six circulating water pumps no longer available-Heavy debris, waves resulted in Travelling water screens stopping" Non-vital Switching Station lost due to water intrusion-Loss of power to several buildings onsite-Lost onsite intranet, phones, met tower data to Salem control rooms 14 Staffing Requirements

• Suspended Salem Unit 2 refueling outage activities on Sunday evening, October 28-All equipment, except SW header, returned to Operations-Reactor Cavity flooded up to Refueling level for defense in depth-All contractors left site that weekend First time in operating history to suspended refueling outage 15 Superstorm Sandy Lessons Learned* Equipment Issues/ Storm Preparations-Substation enclosures are susceptible to water intrusion-Lack of outage contingencies for loss of building capabilities-Lack of adequate sleeping arrangements for essential personnel.

Access road monitoring and shoring -extra fill / seawall 16 Lessons Learned -Root Cause Abnormal Procedure Guidance Inadequate severe weather guidance in Abnormal procedure for wind speed, direction, grassing levels, tide, etc.Decision Making on unit power did not account for wave action effects-Severe Weather Guide -No single designated information source for decision-making 17 Lessons Learned-Corrective actions* Previous Shutdown Criteria-I F AT ANY TIME river level is>98.5 ft. .a* Maximum Tide was 97.2 feet-IF hurricane force winds are imminent...

• Maximum average wind speed was 59 miles per hour° Wind direction shifted 180 in four hours directed at CWIS 18 Lessons Learned -Corrective actions New Shutdown Criteria CW intake degradation index* Uses grassing, tide, wind speed and direction° Guidance to shutdown as a composite If hurricane is to pass within 50 miles of site -shutdown 19 ELECTRIC POWER RESEARCH INSTITUTE Perspectives on Risk Assessment for External Hazards January 6, 2014 Stuart Lewis, Program Manager EPRI Risk & Safety Management Program

PRI Guidance to Focus PRA Efforts" EPRI 1022997, December 2011 Identification of External Hazards for Analysis in Probabilistic Risk Assessment" Insights from development-Importance of plant-specific nature of hazards-Value of complementary qualitative and quantitative criteria Aloeta Hazad Qaiatie Srein Potntill Reevn HazUrd Qunitiv wcenn ca2I~ ELECTRIC PowErR RE SEARCH INSTITUTE© 2013 Electric Power Research Institute, Inc. All rights reserved.2 Use of EPRI Guidance*Wide apparent interest 010'among EPRI members*Collecting of feedback from initial users underway*Early insights for potential improvements-More detailed implementation process-Additional guidance on combined or correlated hazards ELECTRIC POWER 013 Electric Power Research Institute, Inc. All rights reserved.

3 RESEARCHINTUE

© 2 Methods for External Flooding Activities

• Review of available methods-Unique treatments for different flood sources-Experience of US agencies and international organizations

• Selection of most promising approaches

• Testing in table-top and pilot applications ELECTRIC POWER 013 Electric Power Research Institute, Inc. All rights reserved.

4 2 RESEARCH INSTITUTE Q 2(

External Flooding Methods Example resources explored and used: Hazard Prbaiist6 I 1I ~kic[I Mehosl and App licat[ion s] .* Joint Probability Method (JPM)Hurricane* NUREG/CR-71 34 Modeling Set From 2013 Regulatory Information Presentation-A. Miller and K.Conference Huffman RESEARCH INSTITUTE© 2013 Electric Power Research Institute, Inc. All rights reserved.5 Updating Methods for High Winds Background

• Significant technology advancements in 1970's and 1980's o EPRI's focus at that time: tornado missile evaluations Current status*Several new studies -most outside US*EPRI updating methods and guidance (part of our External Hazards Roadmap)trA REECTRIC POWER 013 Electric Power Resarh Institute Inc. Al riahts reserved.

s irc IRSE ARCH INSTITUTE 2C@ 2 v Roadmap for High Winds Research*Extracting useful information on high-wind phenomena from available sources*Focus on missiles and wind loadings-Nature of vulnerabilities (actual and potential)-Exploring graded approach to fragility assessment

• Evaluating need to update risk analysis tools 013 Electric Power Research Institute, Inc. All rights reserved.

RESEARCH INSTITUTE C 2 Summary*Challenges are site- and plant-specific

• Progressive screening can be effective-Focus use of resources-Assure important hazards are considered

• Current focus is to-Advance the state-of-practice for certain hazards-Improve ability to obtain insights and manage risks 013 Electric Power Research Institute, Inc. All rights reserved.

RESEARCH INSTITUTE 02'w Together...Shaping the Future of Electricity 2PnrELECTRIC POWEP 0 2013 Electric Power Research Institute, Inc. All rights reserved.

9- R a RESEARCH INSTITUTE National Efforts to Coordinate Studies and ri % -_ d _ _ n ....-d9 In a m ... .i * ....I i Agenda" Background" Interagency collaboration on flood and extreme storm related activities" Cataloging of extreme storm events" R&D on flood flow and rain frequency analyses" Summary 2 BUILDING STRONG

Civil Works Divisions

& Districts land LEGEND: I Division HQ location 0 District HQ location Division boundary-District boundary State boundary Of"1I BUILDING STRONG41*It

+2-S00 I INTERA~ INY 9R8AI R8IRN 4\n SUSGS science for a changing world US Army Corps of Engineers I AINSPIN A PAM .0ýNational Weather Service Support* Provide Weather, Rain and Climate Forecasts: " Short-term (24-, 48- and 72-hour, 5-day)" Long-term (30-day and 90-day outlook)* Provide River Flood Forecasting (a collaborative effort between agencies)" Rainfall Data Analysis -Publications" 100-, 500-, 1000-year return period (Atlas 14, TP40)" Probable Maximum Precipitation

-PMP (HMRs).gi2ATI, 7 US Geological Survey (USGS)National Stream Gauging Program Honday, June 24, 2013 11:30ET NH DE MD DC PR-U , , HAK Eu0o 8 Explanation

-Percentile classes-I<10 10-24 25-75 76-90 >90 Law b IM pw, Blow Above. uch a66sve Ig C Minnesota River at Granite Falls, MN.Natchez, MS 083450 Nfisiud Alm at Bi~mwck. NO M 5*5*5*.5*a i 5*5*5*5*a"I1 I h&.d 1952d DUMBENmCIKFURS9ESp

-- ---

IWR~INT99R&TP W6T9R 99§W~QRP§

§PPq AIIP §9YIQES IUSGS science for a changing world US Army Corps of Engineers

Integrated Water Resources Science and Services (IWRSS)An Integrated and Adaptive Roadmap for Operational implementation IWRSS Framework aligning the capabilities of multiple agencies with complementary water-related missions to address major water resource challenges and stakeholder needs MOU -USACE, NOAA, USGS"Collaborative Science, Services and Tools to Support Integrated and Adaptive Water Resources Management" May 11, 2011 O q36200 Assistant Secretary of the Army for Civil Works Deputy Undersecretary of Commerce for Oceans and Atmos here Director of the U.S. Geological Survey BUILDING STRONGS 1.2.IWRSS: Two Charters National Flood Inundation Mapping System Interoperability and Data Synchronization B BUILDING STRONG National Flood Inundation Mapping Purpose: to support the collaborative actions required to develop common flood inundation maps, products and services that will help the USACE, USGS, and NWS fulfill their missions.a:.DING STRONG System Interoperability and Data Synchronization Major systems used across the 3 agencies will be made interoperable, i.e., data and information will be able to flow between them seamlessly.

Purpose: to define requirements and technical specifications for system interoperability and data synchronization.

USACE Extreme Storm Team* 2008 -Sub-committee on Hydrology (of Advisory Committee on Water Information

-USGS)establishes Interagency Federal Work Group on Extreme Strom Events* 2010 -USACE establishes Extreme Storm Team o 12-member team o. Collaboration with USBR B DSo oJ00.50 AO MM, MuiLVU ., BUILDING STRONG Extreme Storm Data Needs" Data Archiving

& Analysis of Extreme Storm Events" Regional and Site-Specific Probable Maximum Precipitation (PMP) Studies" NWS/NOAA Hydro-meteorological Reports (HMR's) updates BUILDING STRONG USACE Extreme Storm Projects" Update Extreme Storm Catalog" Digitize Historic Storm Isohyetal Maps" Convert Radar Imagery for Rainfall" Develop Extreme Storm Database" Combine Database with USBR" Set up Web Site to Disseminate Data" Chena Basin Site Specific PMP Study* Review Wyoming Statewide PMP Study aO BUILDING STRONG 2013 R&D Project -ERDC, USACE" Objective:

Provide new, district-usable tools for improved estimation of extreme precipitation and flow frequency" Methods: o. Create software that implements existing and new analytical methods -state-of-the-art for precipitation and flow frequency o Develop new modeling techniques for extending precipitation and flow frequency curves o Use spiral delivery methods to successively roll out products o Use technical advisory committee to provide input on products, direction" Products: o Develop Precipitation Frequency Software o Develop Flow Frequency Software *o BUILDING STRONG Summary" Interagency collaboration on flood and extreme storm related activities with USACE, NOAA, and USGS;" Cataloging of historical extreme storm events -national significance; and* R&D on flood flow and rain frequency analyses, specifically, from extreme storm events.ae BUILDING STRONGS

BACK UP SLIDES aI: BUILDING STRONG, Civil Works Program Preserving the Strength of the Nation Delivering enduring, comprehensive, sustainable, and integrated solutions to the Nation's water resources and related challenges through collaboration with our stakeholders (Regions, States, localities, Tribes, other Federal agencies)($1.884 B) Navigation (39%)River, U) ($1.370 B) Flood Risk (28%)Management

($655 M) Ecosystem (14%)Restoration

& Stewardship

($210 M) Hydropower (4%)($252 M) Recreation

& Natural (5%)Resource Management

($200 M) Regulatory Program: (4%)Wetlands & Waterways ($33 M) Water Supply (1%)($35 M) Emergency Management (1%)($187 M) Expenses (4%)(FY 2014 PresIdent's Budget)Flrd Everglade BUILDING STRONGO Benefits of Federal Projects (Damages Prevented)

Accumulative Corps Expenditures (Principle plus O&M)Adjusted to 2000 Using Construction Cost Index EM 1110-2-1304 (Mar 2013 revision)0 0 0 0 C 0 1200 1000 800 S00 400 200 0 1927 1932 1937 1942 1947 1952 1957 1962 1967 1972 1977 1982 1987 1992 1997 2002 2007 2012 Fiscal Year BUILDING STRONG Comm u n ication/Col la boration* Continuous forecast coordination between NWS forecasters and USACE decision makers including 100+ scenarios for spillway operations

• Daily coordination with USGS & USACE on real time discharge measurements to help validate and adjust hydraulic models and rating curves* NWS personnel stationed at USACE Emergency Operations Center* HEC-RAS collaboration with USACE, NWS, & HEC Quantitative Precipitation Forecasting (QPF)MLMM166,I

/ zýk I ml j USGS 05599490 BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL USGS 05597000 BIG MUDDY RIVER AT PLUMFIELD, IL 4, 35~30~25 26 35 39 4, 25=.4 l 2 15 is Apr -pr Nay Nay a" hay Jun 23 38 07 14 21 28 84 2911 2011 2011 2811 2011 2011 2011-Provisional Data subject to Revision --Gage height M Measured gage height Jun 11 2911 Apr Apr Nav hav 23 3s 07 14 2011 2911 2911 2911 Provisional Data-age height 21 28 94 2011 2011 2011 Subject to Revision -A Measured gage height Jun 11 2811 USGS Streamgages Active in Water-year 2010, Total 7,845 2,423 Streamgages in the Mississippi River Basin Highlighted lop a x:4j~.41.4.I N Puerto Rico and Virgin ICnds Alaskaý41KI$ý Extreme Storm Data Sources m US Storm Rainfall Events (1 882-1973)m Bucket Surveys (USACE, USBR, NWS)* NOAA COOP Observations (1753-2012)

• NWS Radar Estimates (1993-2012) m CoCoRaHS (1998-201 2)* Local&Regional Precipitation Networks (NERain, SD-AWDN, NDAWN, DOT, ALERT, etc)a: BUILDING STRONGS Precipitation Frequency Products P Investigation and reports of new techniques for extended precipitation frequency and AEP data, including updated statistical and stochastic precipitation modeling techniques.

The primary focus will be on the research and development of stochastic techniques.

P Development of tools for the analysis and creation of precipitation frequency and AEP curves, including the relationship of recorded extreme storms to precipitation frequency

/ AEP o Development of tools to create model input data from precipitation frequency and AEP curve data p Development of tools to create model input data from the extreme storm database o Research into the feasibility of using regional atmospheric models to understand how to scale extreme event data into even more extreme scales o Research, development, and implementation (including user interfaces

[UI]) of tools for improved determination of confidence limits of precipitation frequency

/ AEP curves BUILDING STRONG Flow Frequency Products o. Research into using the USACE hydrologic models (HEC-HMS and GSSHA) for transforming precipitation frequency

/ AEP data into flow frequency

/ AEP data" Testing of efficacy of approach" Proof-of-concept demo" Integration with precipitation frequency

/ AEP tools" UI development to create flow frequency

/ AEP" Guidance and tutorial documents o Research, development, and implementation (including UI) of tools for improved determination of confidence limits of flow frequency

/ AEP curves o. Research and development of tools, interfaces, and capabilities to reduce local computational burden and increase usability of products me BUILDING STRONG Mississippi River Watershed h-"1 DING T 6IGSTRONG Bt Missouri River Stage Reduction Due to Reservoir Operations or; "sot')oohý;-o-, R ,nCs 0 1uc; 2011 Flood of Record" Much above average plains snowpack, late-arriving much above normal mountain snowpack and record May rainfall in the upper basin ... flood of record." Runoff in 2011 was 61.0 million acre-feet (MAF), 247 percent of normal and the highest runoff in 114 years o. May was the ninth wettest single month on record with 9.3 MAF P. June was the single wettest month on record with 14.8 MAF of runoff, surpassing the old record of 13.2 MAF set in April 1952.o. July was the fourth wettest single month on record with 10.2 MAF" Combined May through July runoff of 34.3 MAF is higher than the total annual runoff in 102 of 113 years in the period of record* Estimated

0.2 percent

annual exceedance interval BUILDING STRONG System Tested as Never Before..." System storage peaked at a record 72.8 MAF on 1 July o 16 MAF stored flood waters in mainstem reservoirs o Corps and Bureau of Reclamation tributary reservoirs also utilized* Four mainstem reservoirs utilized exclusive flood control zone P Fort Peck, Garrison, Oahe and Fort Randall" Three mainstem reservoirs set record pool levels P Fort Peck, Oahe and Fort Randall* Two mainstem reservoirs utilized surcharge storage oo Fort Peck and Garrison* Spillways at two mainstem dams were operated for the first time o. Garrison and Big Bend" Record releases from all mainstem reservoirs Ii BUILDING STRONG