An assembly comprising: a safety apparatus; and a sub-assembly (117, 150) the safety apparatus for containing an energy release from a rotor sub-assembly (117, 150) having a tension stud, the safety apparatus comprising: a plurality of containment members, wherein each containment member comprises: an elongate region defining a longitudinal axis; and characterised by at least two arms projecting away from the longitudinal axis of the elongate region; and at least one connecting member connected to at least two of the plurality of containment members, wherein in use the at least one connecting member is configured to connect the safety apparatus to the sub-assembly (117, 150) and the plurality of containment members are configured to withstand an energy release from the sub-assembly (117, 150) in the event of a failure of one or more components and/or connections of the sub-assembly (117, 150), and characterized by the sub-assembly (117, 150) comprising: a shaft of a rotor assembly, the shaft comprising a journal; a tension stud extending through the shaft; an adapter engaged with a first end of the shaft; and a load retainer configured to engage with a second end of the shaft and receive the tension stud, wherein, in use, the load retainer is configured to move relative to the tension stud and transfer a load from the tension stud to the shaft. a safety apparatus; and a sub-assembly (117, 150) the safety apparatus for containing an energy release from a rotor sub-assembly (117, 150) having a tension stud, the safety apparatus comprising: a plurality of containment members, wherein each containment member comprises: an elongate region defining a longitudinal axis; and characterised by at least two arms projecting away from the longitudinal axis of the elongate region; and at least one connecting member connected to at least two of the plurality of containment members, wherein in use the at least one connecting member is configured to connect the safety apparatus to the sub-assembly (117, 150) and the plurality of containment members are configured to withstand an energy release from the sub-assembly (117, 150) in the event of a failure of one or more components and/or connections of the sub-assembly (117, 150), and characterized by the sub-assembly (117, 150) comprising: a shaft of a rotor assembly, the shaft comprising a journal; a tension stud extending through the shaft; an adapter engaged with a first end of the shaft; and a load retainer configured to engage with a second end of the shaft and receive the tension stud, wherein, in use, the load retainer is configured to move relative to the tension stud and transfer a load from the tension stud to the shaft. and a sub-assembly (117, 150) the safety apparatus for containing an energy release from a rotor sub-assembly (117, 150) having a tension stud, the safety apparatus comprising: a plurality of containment members, wherein each containment member comprises: an elongate region defining a longitudinal axis; and characterised by at least two arms projecting away from the longitudinal axis of the elongate region; and at least one connecting member connected to at least two of the plurality of containment members, wherein in use the at least one connecting member is configured to connect the safety apparatus to the sub-assembly (117, 150) and the plurality of containment members are configured to withstand an energy release from the sub-assembly (117, 150) in the event of a failure of one or more components and/or connections of the sub-assembly (117, 150), an elongate region defining a longitudinal axis; and characterised by at least two arms projecting away from the longitudinal axis of the elongate region; and at least one connecting member connected to at least two of the plurality of containment members, wherein in use the at least one connecting member is configured to connect the safety apparatus to the sub-assembly (117, 150) and the plurality of containment members are configured to withstand an energy release from the sub-assembly (117, 150) in the event of a failure of one or more components and/or connections of the sub-assembly (117, 150), and characterized by the sub-assembly (117, 150) comprising: a shaft of a rotor assembly, the shaft comprising a journal; a tension stud extending through the shaft; an adapter engaged with a first end of the shaft; and a load retainer configured to engage with a second end of the shaft and receive the tension stud, wherein, in use, the load retainer is configured to move relative to the tension stud and transfer a load from the tension stud to the shaft. a shaft of a rotor assembly, the shaft comprising a journal; a tension stud extending through the shaft; an adapter engaged with a first end of the shaft; and a load retainer configured to engage with a second end of the shaft and receive the tension stud, wherein, in use, the load retainer is configured to move relative to the tension stud and transfer a load from the tension stud to the shaft.