Wyniki wyszukiwania - BazTech

1

Ocena ryzyka związanego z transportem drogowym substancji niebezpiecznych

Borysiewicz M., Kacprzyk W., Potempski S.

Przemysł Chemiczny

|

2016

|

T. 95, nr 3

604--608

2

Loss of offsite power caused by tornado in Surry NPP : a case study

Borysiewicz M., Kaszko A., Kowal K., Potempski S.

Journal of Polish Safety and Reliability Association

|

2015

|

Vol. 6, No. 3

25--30

EN

The aim of this work was to perform the real case study for the US Surry Nuclear Power Plant which was touched down by tornado in 2011 causing the electrical switch yard destruction and loss of offsite power. Probabilistic methods have been applied to assess the reliability of the reactor shutdown and effective heat removal after this accident. The reactor protection system and auxiliary feedwater system were thoroughly analysed in the context of their safety features designed to prevent the reactor core damage. The emergency power system reliability has been also considered due to the fact that some components of the safety systems are electrically operated. Moreover, time-dependent analysis has been performed in order to address the level of damages after an extreme external event like tornado. Depending on the severity of such events the time required to restore the electrical grid may be significantly different and longer than 24 hours. The reliability and requirements for safety systems are changing with time and these changes have been taken into account as well.

3

CFD analysis of the safety related thermal hydraulic parameters describing a flow domain of an experimental medical installation (BNCT converter) inside of the Research Reactor MARIA

Prusiński P. A., Potempski S., Borysiewicz M., Kowal K., Kwiatkowski T., Prusiński A. M.

Journal of Power Technologies

|

2012

|

Vol. 92, nr 4

227--240

EN

The Boron-Neutron Capture Therapy (BNCT) is an experimental radiotherapy technique used to treat the most aggressive types of brain tumors that cannot be surgically removed from the human body. To date, clinical trials of BNCT have been initiated at only a handful of reactors around the world, but advanced studies on BNCT are still being carried out in numerous research centers where the suitable or convertible reactors are available. Construction of BNCT facilities is justified only at some existing reactors. Others can possibly be adapted for BNCT by using fission converters to modify the energy spectrum of the primary neutron beam, which makes it useful for treatment purposes. The BNCT converter, designed for use in the MARIA research reactor at the National Centre for Nuclear Research [W1] (NCBJ) in Świerk near Warsaw, Poland, consists of 99 fuel rods (containing low-enriched uranium) inside of the aluminum box. Since its installation affects the core layout and possibly may affect the normal operating regime of the reactor, additional safety analyses must be performed to prove the existence of sufficient safety margins. In this study modern Computational Fluid Dynamics (CFD) techniques have been applied to assess the maximum temperature of the rod wall surfaces, the temperature difference between the inlet and outlet of the converter channel, as well as the maximum and average velocity of the fluid and to compare them with the results presented in the reference analytical study.

4

Geoinformacyjne systemy wspomagania decyzji w sytuacji kryzysowej spowodowanej awarią chemiczną, radiologiczną lub aktem terroru

Borysiewicz M., Potempski S.

Zeszyty Naukowe AON

|

2005

|

nr 1(58)A Numer Specjalny

42-65

EN

Geographical information systems are important elements of modern systems for emergency planning and management of crisis situation. Examples of such systems are: RODOS (nuclear accidents) and SWAR (major chemical act dents). The RODOS system has been installed in the Centre for Radiological Events of the National Atomic Energy Agency. The system is constructed to support decision making from the earliest stage of radiological accident till the very late stage- even many years after the event, both for short and long-range distances. The system works in real-time with on-line connection to monitoring networks. The computerized system SWAR integrates: (1) General plant database connected to geographical information system; (2) Diagnosis and prognosis of emergency situation based on measurement or/and simulation calculations; (3) Support of alarming, management and co-ordination of rescue operations. The system works in three modes: administration, emergency planning and support of emergency response. In the paper these both systems have been described.

5

Implementation of pre-operational version of RODOS System in the Center for Radiological Events of the National Atomic Energy Agency in Poland

Borysiewicz M., Potempski S., Żelazny R.

Journal of Technical Physics

|

2002

|

Vol. 43, no 3

287-307

EN

This paper is devoted to the comprehensive description of the implementation of the RODOS System in the Center for Radiological Events (CEZAR) of the National Atomic Energy Agency in Poland. First the history of the RODOS Project of the European Commission is presented, followed by the description of the structure and modules of this comprehensive Software Package, aimed to assist in the management of the nuclear emergency problems following the nuclear accident in Europe. Then the adaptation of the software to Polish national conditions is explained taking into account the radiological data prevailing on the Polish territory. All the data bases connected with meteorology, contamination transport parameters in humans and their ecological systems have been collected and applied to meet the specific dietary habits, soil structures, agricultural situation and other specific condition in this country. Those data have been introduced into the system after appropriate adaptations to the specific requirements of the modules of the RODOS System. Furthermore, the network system connected with the RODOS prc-operational version in CEZAR is described enabling on-line cooperation with the Institute of Meteorology and Water Management (IMWM) and the Central Laboratory for Radiological Protection (CLOR) as well as with the Institute of Atomic Energy (IAE), which plays the role of Technical Support Organization with respect to this System. IAE has participated in the development of the RODOS System within tlie 4-th and 5-th Research Frameworks of EU and acknowledges here with gratitude the Implementation Grant from the State Committee of Scientific Research and National Atomic Energy Agency in Poland. This Grant has created the basis for the implementation of the RODOS System in Poland within tlie framework and assistance of the ECHO contract of the EU.