Self-styled alternative energy venders were raking in the cash, hawking "low flow" shower heads at $9.95 and "People's Buttons" - such as one proclaiming "Capitalism is Organized Crime" - for $1.

"The American people are used to being hit commercially so it's a good way to get the "no nukes' message across," said Ann Goolaskain of Boston, who sold $5 T-shirts that read: "We all live in Pennsylvania."

She came to this grassed-over gravel pit this weekend with about 4.000 others for the annual rally against the embattled Seabrook nuclear plant, a symbol of the national struggle against nuclear power.

But while the main selling point was "nuclear education," factions of nal squabble that threatens to split the antinuclear movement here at its birthplace.

Rennie Cushing, a founding member of the Clamshell Alliance, wants to use civil disobedience tactics to close the New York Stock Exchange for a day on the 50th anniversary of the crash this October. "If Wall Street won't shut down Seabrook, the antinuclear movement will shut down Wall Street."

Meanwhile, a militant Clamshell faction was recruiting protestors for an Oct. 6 "occupation" of the Seabrook site, where construction is only 20 percent complete.

"The time for games has ended," said Harvey Halpern of the Boston-based Coalition for Direct Action. "We've had the folksingers, the energy demonstrations and the mass rallies, but now we're going to stop playing games and finally stop construction of Seabrook."

The Boston coalition, which barred the press from its open-air recruitment sessions, is taking a stronger stand than the Clamshell movement - founded in a Quaker philosophy of nonviolence - has taken before.

The group plans to cut the chain link fences near the salt marshes at one end of the 2,300-megawatt, twin-reactor unit and try to establish a community at the site until construction has been halted. Protestors will resist arrest.

Although Clamshell's main office downplays dissension and has endorsed the occupation, it has not committed funds or manpower to it. Sources close to the debate concede there is a major rift but say it is being patched up through discussions.

Dick Lewis, the staff director of the Seacoast Antipollution League, one of the original interveners in regulatory hearings on the Seabrook plant, denounced the militant faction's stance.

We've taken a long time developing good relations on the seacoast and I would hate to have a militant faction of Clams ruin the credibility of the antinuclear movement," he said.