NullReferenceException from ModuleActiveRadiator.IsSibling

[BrettRyland]

An issue I often see in my logs comes from when radiators are being used (typically in conjunction with a nuclear power supply). When one of them gets destroyed (e.g., during space combat with BDArmory), the log gets a long string of the following exception until the other radiators get destroyed too.

[EXC 09:05:05.451] NullReferenceException: Object reference not set to an instance of an object
  ModuleActiveRadiator.IsSibling (Part targetPart) (at <be370b73275e49439ea5e41ceef6700f>:0)
  ModuleCoreHeat.MoveCoreEnergyToRadiators (System.Double excess, System.Double deltaTime) (at <be370b73275e49439ea5e41ceef6700f>:0)
  ModuleCoreHeat.FixedUpdate () (at <be370b73275e49439ea5e41ceef6700f>:0)
  UnityEngine.DebugLogHandler:LogException(Exception, Object)
  ModuleManager.UnityLogHandle.InterceptLogHandler:LogException(Exception, Object)
  UnityEngine.Debug:CallOverridenDebugHandler(Exception, Object)

This is a call that's part of KSP's heat system ModuleActiveRadiator.IsSibling
Is there anything that can be done to fix this?

The full log is KSP.zip