2016-7 Joint ICTP/IAEA Advanced Workshop on Earthquake Engineering .Joint ICTP/IAEA Advanced Workshop

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  • 2016-7

    Joint ICTP/IAEA Advanced Workshop on Earthquake Engineeringfor Nuclear Facilities

    Hiroshi Abe

    30 November - 4 December, 2009

    Japan Nuclear Energy Safety OrganizationSeismic Safety Division

    TokyoJapan

    Outline of seismic regulation on NPPsand

    Seismic safety re-evaluation in Japan

  • 1

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    ICTP/IAEA Advanced Workshop on Earthquake Engineering for ICTP/IAEA Advanced Workshop on Earthquake Engineering for Nuclear FacilitiesNuclear Facilities

    Outline of seismic regulation on NPPsOutline of seismic regulation on NPPsand and

    Seismic safety reSeismic safety re--evaluation in Japanevaluation in Japan

    Dec. 1Dec. 1 20092009

    Hiroshi AbeHiroshi Abe

    Incorporated Administrative Agency Incorporated Administrative Agency

    Japan Nuclear Energy Safety Organization (Japan Nuclear Energy Safety Organization (JNESJNES))Seismic Safety DivisionSeismic Safety Division

  • 2

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    ContentFormation of seismic regulation in JapanFormation of seismic design code in JapanOutline of ;

    - 1 Seismic Design Review Guide(JNSC); comparing Before and Revised

    -2 Technical Guidelines forSeismic design of NPP(JEAG4601)

    Status of Seismic Assessment

    -1 Kashiwazaki-Kariwa NPPs

    -2 Re-evaluation of other NPPs

  • 3

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    Seismic Safety Regulation System in Japan

    Hyogo-Ken Nambu Earthquake (1995.1)

    Miyagi-Oki Earthquake (2005.8) - Onagawa NPPs Shut Down

    Revision of Safety Review Guideline for Seismic Design (NSC: 2006.9)

    Noto-Hanto-Oki Earthquake (2007.3) - Shika NPPs

    Under Shut Down StateNiigata-Ken Chuets-Oki Earthquake

    (2007.7)- Kashiwazaki-Kariwa NPPs Shut Down

    Suruga-Bay Earthquake (2009.8)- Hamaoka NPPs Shut Down

    HyogoHyogo--Ken NambuKen Nambu Earthquake (1995.1)

    MiyagiMiyagi--OkiOki Earthquake (2005.8) - Onagawa NPPsOnagawa NPPs Shut DownShut Down

    Revision of Safety Review Guideline for Safety Review Guideline for Seismic DesignSeismic Design (NSCNSC: 2006.9)

    NotoNoto--HantoHanto--OkiOki Earthquake (2007.3) - Shika NPPsShika NPPs

    Under Shut Down StateUnder Shut Down StateNiigataNiigata--Ken ChuetsKen Chuets--OkiOki Earthquake

    (2007.7)- KashiwazakiKashiwazaki--Kariwa NPPsKariwa NPPs Shut DownShut Down

    SurugaSuruga--BayBay Earthquake (2009.8)Earthquake (2009.8)-- Hamaoka NPPsHamaoka NPPs Shut DownShut Down

    Resent Events Related EarthquakesResent Events Related Earthquakesand Seismic Safety of NPPsand Seismic Safety of NPPs

    Seismic Safety Div.(established Oct.2007)

    Seismic safety reviewing office(established April 2004)

    9 Electric Power companiesJapan Electric Association

  • 4

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    Formation of seismic design code in JapanNuclear Safety CommissionRegulatory Guide for Reviewing Seismic Design of NPP (15pages) 1981July Established

    2006 Sept. Revised

    METI (Nuclear and Industrial Safety Agency)Ministry Code No62 Technical code for

    NPP Article5 Seismic requirement

    Japan Electric Association (Utilities)Technical Guidelines for Seismic Design of NPPs

    JEAG4601 (1300pages) (English version: NUREG/CR-6241)1970,1984,1987,1991 Completed gradually

    Now revising

  • 5

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    Outline of ;-1 Japan Nuclear Safety Commissions;

    Seismic Design Review Guidecomparing Before and Revised

  • 6

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    S (old As and A), B, COld A class ranked up to As

    As, A, B, CSeismic Seismic ClassificationClassification

    ConsiderConsider the effect of;the effect of;Tsunami,Tsunami,Collapse of around inclined planeCollapse of around inclined plane

    Phenomena Phenomena accompanying accompanying earthquakeearthquake

    Possibility of over DBE earthquake cannot be denied. Risk by over DBE causing serious damage to SSCs and massive radioactive release is to beassessed for reference (Residual Risk)Utilities should evaluate the risk for reference

    and make effort to minimize the risk.

    Over DBEOver DBEEarthquakeEarthquake

    Define Fv dynamicallyFv= 1/2 FH (Static)Consideration of Consideration of Vertical Seismic Vertical Seismic ForceForce

    Use most updated knowledge and techniqueGeological Geological SurveySurvey

    One DBE Ss: Consider active fault hereafter

    late Pleistocene (80000-130000y before)Keep function

    Sd for design to stay in elastic regionSd=Ss ; 0.5

    Class S component

    S1: Return period more than 10000yStay in elastic region

    S2: Return period more than 50000yKeep function

    Class AsA component

    Design Base Design Base Earthquake Earthquake DefinitionDefinition

    RevisedBeforeItem

    Main points of the revisionMain points of the revision

  • 7

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    Basic Earthquake Ground Motion 1Basic Earthquake Ground Motion 1

    Basic Earthquake Ground Motion 2Basic Earthquake Ground Motion 2

    BeforeBefore

    RevisedRevised

    Active Faults

    Past Earthquakes

    Seismo-tectonic Features

    Intra-plate Earthquakes

    Basic Earthquake Ground Motion SsBasic Earthquake Ground Motion Ss

    Inter-plate Earthquakes

    Ground m

    otion EvaluationG

    round motion Evaluation

    Considered Earthquakes

    Ground m

    otion EvaluationG

    round motion Evaluation

    Considered Earthquakes

    Horizontal componentonly

    Both Horizontaland Vertical

    Near Field Earthquake

    Maximum Design Earthquake

    Extreme Design Earthquake

    Shallow Inland Earthquakes

    Design Earthquake Ground Motion SdDesign Earthquake Ground Motion Sd

    Site-specific Ground motionwith specified source

    Ground motion with non-specified source

    DBE Definition DBE Definition -- Earthquake Research FlowEarthquake Research Flow

  • 8

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    BeforeBefore

    RevisedRevised

    Active Faults

    Past Earthquakes

    Seismo-tectonic Features

    c. Intra-plate Earthquakes

    a. Inter-plate Earthquakes

    b. Shallow Inland Earthquakes

    Earthquake documentsActive faults researchSeismicity near site

    Consider with each research methods

    Consider with each source type

    DBE Definition DBE Definition -- Earthquake ConsiderationEarthquake Consideration

  • 9

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    BeforeBefore

    RevisedRevised

    Empirical methods (Response spectrum evaluation)

    Empirical methods + Strong motion evaluation using Earthquake source modelReflected in IAEA seismic hazard evaluation guide DS422

    Point source

    Consider the effects of the fault plane

    Evaluate the Ground motion directly

    DBE Definition DBE Definition Ground Motion EvaluationGround Motion Evaluation

  • 10

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    BeforeBefore

    RevisedRevised

    Consider NearConsider Near--field Earthquake field Earthquake

    (M6.5, 10km beneath the site) (M6.5, 10km beneath the site)

    s

    (c

    m/s)

    0.01 0.1 1 10

    1

    10

    100

    Estimate the upper level of the ground Estimate the upper level of the ground motion difficult to specify the source by motion difficult to specify the source by survey in the vicinity of the sitesurvey in the vicinity of the site

    Estimate directly on the basis of Estimate directly on the basis of nearnear--source strong motion recordssource strong motion records

    s

    (c

    m/s)

    0.01 0.1 1 10

    1

    10

    100

    DBE Definition DBE Definition NearNear--Field EarthquakeField Earthquake

  • 11

    Incorporated Administrative Agency Incorporated Administrative Agency Japan Nuclear Energy Safety Organization Japan Nuclear Energy Safety Organization

    BeforeBefore

    RevisedRevised

    Consider the active faults that has activity in 50,000 yearsConsider the active faults that has activity in 50,000 years

    For Ss, consider the active faults that has activity in the lateFor Ss, consider the active faults that has activity in the late PleistocenePleistocenereferring to last Interglacial stratareferring to last Interglacial strataabout 80,000 about 80,000 130,000 years before130,000 years before

    Active Fault of Low activity (Return period more than 50,000 Active Fault of Low activity (Return p