ML23292A212

1 to Updated Final Safety Analysis Report, Questions and Responses 222.1 Through 222.2

ML23292A212
Person / Time
Site:	Susquehanna
Issue date:	10/12/2023
From:	Susquehanna
To:	Office of Nuclear Reactor Regulation
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SSES-FSAR QUESTION 222.1 Describe in detail how the feedwater line and recirculation line short-term mass and energy release rates, used in the annulus pressurization and loading calculations, were determined.

Provide, separately, as a function of time, the mass flux (lbm/sec/ft 2 ) and areas used for each side of the break (the reactor vessel side and the inventory or long pipe side). List all assumptions and conservatisms used. If a hand calculation was used for this analysis, document the work done.

RESPONSE

Refer to Appendix 6A for response.

Rev. 46, 06/93 222.1-1

SSES-FSAR QUESTION 222.2 One second after a postulated steam line break, a quality less than 1.0 was assumed to exit the rupture.

This may provide the limiting containment pressurization, but may not provide the limiting containment temperature. Assuming 100\

efficiency for the steam separators and dryers, provide the mass and energy release rates which would occur with a 1. 0 break quality. Show that this would not provide the limiting condition for the drywell and suppression pool temperature.

RESPONSE

FSAR Subsection 6. 2 .1.1. 3. 3. 2 has been revised to provide this information.

Rev. 46, 06/93 222.2-1