LONDON -- Standard&Poor's CreditWire 4/11/96 -- Standard&Poor's today has assigned its double-`B'-plus long term rating to Eskom's Yen 15 billion five year Samurai bond. The outlook on the rating is positive. The rating reflects Eskom's position as South Africa's primary generator and transmitter of electricity and its strategic importance in supporting long-term economic growth in the country. The rating also acknowledges support offered to Eskom through an evolving regulatory environment, as well as low tariff rates, good plant and management operations, and limited near-term capital needs. Risks reflected in the ratings include a certain reliance on large customers in the cyclical mining and basic metals sectors, an ambitious electrification program, a substantial albeit declining debt burden,