Генерация малогрупповой библиотеки для активной зоны ВВЭР-1200 с использованием Монте-Карло кода Serpent

Представлены результаты комплексного исследования, направленного на разработку и валидацию методологии создания двухгрупповых библиотек сечений для реакторного кода DYN3D в формульном формате (IWQS = 2) с использованием прецизионного Монте-Карло кода Serpent. Исследование ориентировано на ядерный реактор ВВЭР-1200 Белорусской АЭС. Методика предполагает расчет двухгрупповых сечений и других констант для различных состояний реактора. Показано, что наибольшее отклонение для k_∞ у всех типов тепловыделяющих сборок (ТВС) при расчете по коду DYN3D с полученной библиотекой отличается от прецизионного расчета по Монте-Карло коду Serpent на величину порядка 1000 ppm. Этот уровень точности является достаточным для проведения расчетов с данной библиотекой по анализу безопасности работы реактора ВВЭР-1200 в различных условиях эксплуатации. Проведен расчет концентраций борной кислоты в процессе кампании для первой и стационарной топливных загрузок реактора и распределения энерговыделения в начале кампании. Полученные результаты подчеркивают надежность и эффективность разработанной методики.

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