%MODE Card

This card is used to describe the calculation mode. It has several options as follow

%MODE	Variable	Description	Available options
LINE 1	MODE	Calculation mode	FORWARD : Forward Calculation ADJOINT : Adjoint Calculation FIXEDSRC : Fixed Source Calculation BCSEARCH: Critical boron concentration search RODEJECT : Rod ejection and/or insertion mode (transient problems)

There are some conditions for some calculation modes.

1. When calculation mode is FIXEDSRC, then the %ESRC card must be present
2. When calculation mode is BCSEARCH, then the %CBCS OR %XTAB card must be present
3. When calculation mode is RODEJECT, then the %EJCT card must be present

Example:

! Mode card
%MODE
FORWARD