SLX value on DOE deal

I've cocked this up surely, but how nice would it be if the DOE deal is worth $0.68c/share ($USD)?

Play around with this and let me know what assumptions are wrong, and then lets see if we can attribute some current valuation.  Surely there's enough data about to do this now.

	Column 1	Column 2	Column 3
0	U/lb ($US)	$20	Currently $18.75 in depressed market
1	total production (MTU)	300000	As agreed DOE / GLE
2	enrichment factor	0.5	Assume "high assay tails" have half quantity of natural U3O8
3	value	$6,612,000,000	2204 lb/MTU x $/lb x enrichment factor
4	royalty	10%	Range 7% - 12%
5	SLX value	$661,200,000	royalty x value
6	"average" value date	2040	Assume 40 years production, mid point of timeframe
7	Discount rate	7%	Pick a number!
8	NPV (total $US)	$115,857,355.21
9	Shares outstanding	170,500,000
10	Value per share	$0.68	$USD
11	pe	20	Just because
12	Current valuation	$13.59	Surely not!

I am not Sir Knight!  Nor am I Moosey or silex or any of the other gang.  But I reckon I met half of you at the SLX AGM about 10 years ago when the share price was what it is now.  It then headed to about $12 at one point.  How lovely will it be when it heads back in that direction again?