Честное слово, не ожидал положительной оценки своих скромных усилий.
Пара моментов.
1. О боре. Применение
10В в выгорающих поглотителях 2-х видов, и для некоторых стержней ПЭЛ СУЗ, новостью не является. Вот ВХР ПСБ АР-1000, что-то сложно найти.
2. О гермопроходках в ГО,
электрическая часть. Страницы 8.3-13 - 8.3-14 (Non safety related, класс не 1Е):
QUOTE
8.3.1.3.4 Raceway and Cable Routing
When cable trays are arranged in a vertical array they are arranged physically from top to bottom, in accordance with the function and voltage class of the cables as follows:
• Medium voltage power (11/6.9 kV)
• Low voltage power (400 Vac, 230 Vac, 125 Vdc/250 Vdc)
• 230 Vac/125 Vdc/250 Vdc signaland control (if used)
• Instrumentation (analog and digital)
400 Vac, 230 Vac, 125 Vdc/250 Vdc power cables may be mixed with 230 Vac/125 Vdc/
250 Vdc signal and control cables.
Separate raceways are provided for medium voltage power, low voltage power and control, as
well as instrumentation cables.
Для 1Е, Страницы начиная с 8.3-17, цитата с 8.3-21:
QUOTE
8.3.2.4.2 Raceway and Cable Routing
There are five separation groups for the cable and raceway system: group A, B, C, D, and N. Separation group A contains safety-related circuits from division A. Similarly, separation group B contains safety-related circuits from division B; group C from division C; group D from division D; and group N from nonsafety-related circuits.
Cables of one separation group are run in separate raceway and physically separated from cables of other separation groups. Group N raceways are separated from safety-related groups A, B, C and D. Raceways from group N are routed in the same areas as the safety-related groups according to spatial separation stipulated in Regulatory Guide 1.75 and IEEE 384 with the following exceptions:
• Within the main control room and remote shutdown room (nonhazard areas), the minimum vertical separation for open top cable tray is 3 inches (7.62 cm) and the minimum horizontal separation is 1 inch (2.54 cm).
• Within general plant areas (limited hazard areas), the minimum vertical separation is 12 inches (30.48 cm), and the minimum horizontal separation is 6 inches (15.24 cm) for open top cable trays with low-voltage power circuits for cable sizes <2/0 AWG (70 mm2). For configurations that involve exclusively limited energy content cables (instrumentation
and control), these minimum distances are reduced to 3 inches (7.62 cm) and 1 inch (2.54 cm) respectively.
• Within panels and control switchboards, the minimum horizontal separation between components or cables of different separation groups (both field-routed and vendor-supplied internal wiring) is 1 inch (2.54 cm), and the minimum vertical separation distance is 6 inches (15.24 cm).
• For configurations involving an enclosed raceway and an open raceway, the minimum vertical separation is 1 inch (2.54 cm) if the enclosed raceway is below the open raceway. The exceptions to the guidance in Regulatory Guide 1.75 are based on test results used to support exceptions to the separation guidance for operating nuclear power plants. A summary of test
results from ten electrical separation test programs is documented in Reference 13. These test programs support the АP1000 exceptions.
Non-Class 1E circuits are electrically isolated from Class 1E circuits, and Class 1E circuits from different separation groups are electrically isolated by isolation devices, shielding and wiring techniques, physical separation (in accordance with Regulatory Guide 1.75 for circuits in raceways), or an appropriate combination thereof.
Если на русском, то вертикальное расстояние между точками ввода кабелей разного вольтажа (средние, низкие, слаботочка) не менее 1 фута, который по слухам равен ~30,4 см. Горизонтальное - 1/2 фута, около 15,2 см. Согласно проекту вся электрика идет снизу вверх по ГО, вверху проходка, далее раздается ответственным потребителям, или любому оборудованию. В целом страниц на 10 английского, причем некоторые моменты противоречат друг другу, как то допустимость использования одного кабель-канала низкого вольтажа (менее 380-400 В) для прокладки разных кабелей, шин, вплоть до слаботочки при условии(!) надежного экранирования. Про защиту от возгорания, написано не мало, класс по сейсмичности 1, призывают особо проводку в кабель-каналах не трамбовать.
P.S. К моему глубокому сожалению, IEEE просил по 132$ за стандарт, идиотизм.