CREATE TABLE table_name_74 (net_power VARCHAR(255), type VARCHAR(255), finish_construction VARCHAR(255))
What was the net power, when the type was wwer-440/230, and when construction was finished on 24.10.1977?
    
SQL: SELECT net_power FROM table_name_74 WHERE type = "wwer-440/230" AND finish_construction = "24.10.1977"