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Research Papers

Full-Scope Probabilistic Safety Assessment of Balakovo Unit 1 in Russia

[+] Author and Article Information
Vladimir Morozov

Atomenergoproekt,
Bakuninskaya 7, Bld. 1,
Moscow 105005, Russia

Gennady Tokmachev

Atomenergoproekt,
Bakuninskaya 7, Bld. 1,
Moscow 105005, Russia
e-mail: tokmach@orc.ru

Rostislav Lutsuk, Sergey Kopylov

Balakovo NPP,
Balakovo, Saratov Region 413800, Russia

1Corresponding author.

Manuscript received January 14, 2015; final manuscript received March 11, 2016; published online December 20, 2016. Assoc. Editor: Dmitry Paramonov.

ASME J of Nuclear Rad Sci 3(1), 011016 (Dec 20, 2016) (4 pages) Paper No: NERS-15-1005; doi: 10.1115/1.4033087 History: Received January 14, 2015; Accepted March 11, 2016

The Balakovo Nuclear Power Plant operating in Russia has four operating units of a VVER-1000 type. The first unit was connected to the grid on Dec. 28, 1985, and put in commercial operation on May 23, 1986. According to modern requirements of the Russian Nuclear Regulatory Authority, the full-scope probabilistic safety assessment (PSA) must be performed to extend the license for operation beyond an initial 30-year lifetime of the unit. The paper presents the results of the Level 1 PSA covering internal initiating events for power and shutdown operational plant states, internal hazards (fires and floods), and external hazards, including natural and man-made events, in particular, seismic impact, and aircraft crash.

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References

Figures

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Fig. 1

Contribution of initiating event to fuel-damage frequency at-power

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Fig. 2

Seismic hazard curve for the Balakovo site

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Fig. 3

Stages of the external hazard PSA

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Fig. 4

Contribution to the fuel-damage frequency from different categories of initiators

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