Some of the smallest credit unions closed by Gov. Bruce G. Sundlun will reopen next week, but obstacles remain to putting the largest, with thousands of depositors, back in business.

Seven credit unions won approval Wednesday for federal deposit insurance. The National Credit Union Administration announced Thursday an additional 15 also will be granted insurance once they pay insurance premiums and sign agreements.The 22 now slated to reopen have assets of $381 million, the NCUA said.

Eleven credit unions and 10 small banks remain closed. Sundlun shut the institutions just hours after being sworn in Tuesday. Two inactive institutions did not apply for federal insurance and are not expected to reopen.

The NCUA said in a statement Thursday that the 11 credit unions "are not currently insurable. . . . These credit unions were found to hold a high proportion of commercial, real estate and other loans which are non-performing or are poorly underwritten. Some credit unions have extremely high delinquency, and in some cases solvency is in question."

Prospects are brighter for the 10 banks. Applications for Federal Deposit Insurance Corp. coverage of the banks are being processed on an expedited basis, the FDIC said.

Forty-three other banks and credit unions with federal insurance opened as usual Wednesday in Rhode Island.

Sundlun ordered the closures because the state-chartered institutions' private insurer, the Rhode Island Share and Deposit Indemnity Corp., ran short on cash.

A bank failure and a run on a credit union depleted RISDIC's assets, leaving $1.7 billion in 300,000 accounts virtually unprotected.

RISDIC asked to be placed in conservatorship Monday, prompting Sundlun to take action.

The fate of the remaining 11 credit unions was uncertain. Sundlun would not identify them.

Part of the problem is the way they do business. They make more commercial loans than their counterparts nationwide. Federal insurance officials consider too many commercial loans a high risk.

"The type of loans that they've participated in are not loans that the mom-and-pop credit unions throughout the country handle," said Joseph Bellucci, RISDIC chairman.