BRIEF-FirstEnergy Nuclear Operating Co says Beaver Valley Power Station unit 2 returned to service on May 21
* Says Beaver Valley Power Station Unit 2 in Shippingport, Pa., returned to service on Sunday, May 21
May 9 Great Quest Fertilizer Ltd:
* Northern Mali Mining and trucking agreement
* Great Quest Fertilizer Ltd - Salam Mineau and Great Quest will jointly create a malian company
* Great Quest Fertilizer Ltd - Newco will have a 6 member board of directors, 4 appointed by great quest and 2 appointed by Salam Mineau Source text for Eikon: Further company coverage:
CHICAGO, May 22 CHS Inc, the biggest U.S. agricultural cooperative, named a new chief executive on Monday, after suffering a sharp decline in income and confirming it was a creditor of a failing Brazilian commodities trader.
* Serinus energy inc.: sabria field in tunisia temporarily shut-in