LONDON (Dow Jones)--National Grid PLC (NG.LN), a U.K. power firm, said Monday it has received valid acceptances in respect of 932.65 million new shares, representing 94.2% of the total number of shares offered to qualifying shareholders pursuant to the 2:5 rights issue announced May 20. -Shares closed Friday at 499 pence valuing the company at GBP17.3 billion. -By Ian Walker, Dow Jones Newswires; 44-20-7842-9296; [email protected] (END) Dow Jones Newswires June 14, 2010 02:25 ET (06:25 GMT)