A beneficiary under subsection (a) of this section, except one under subsection (a)(D)(v), ceases to be entitled to payment on the happening of an event which would terminate his right to compensation for death under
section 8133 of this title. When that entitlement ceases, compensation remaining unpaid under subsection (a) of this section is payable to the surviving beneficiary in accordance with subsection (a) of this section.