diff --git a/src/thermophysicalModels/radiation/radiationModel/P1/P1.C b/src/thermophysicalModels/radiation/radiationModel/P1/P1.C
index 5a7e598278..dee9629292 100644
--- a/src/thermophysicalModels/radiation/radiationModel/P1/P1.C
+++ b/src/thermophysicalModels/radiation/radiationModel/P1/P1.C
@@ -50,12 +50,9 @@ namespace Foam
     }
 }
 
-//  Radiation solver iteration
-Foam::label Foam::radiation::P1::iterRadId = pTraits<label>::one;
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-// Construct from components
 Foam::radiation::P1::P1(const volScalarField& T)
 :
     radiationModel(typeName, T),
@@ -136,14 +133,8 @@ bool Foam::radiation::P1::read()
 }
 
 
-void Foam::radiation::P1::correct()
+void Foam::radiation::P1::calculate()
 {
-    if (!radiation_ || !(iterRadId == nFlowIterPerRadIter_))
-    {
-        iterRadId++;
-        return;
-    }
-
     a_ = absorptionEmission_->a();
     e_ = absorptionEmission_->e();
     E_ = absorptionEmission_->E();
@@ -171,8 +162,6 @@ void Foam::radiation::P1::correct()
      ==
       - 4.0*(e_*radiation::sigmaSB*pow4(T_) + E_)
     );
-
-    iterRadId = pTraits<label>::one;
 }
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModel/P1/P1.H b/src/thermophysicalModels/radiation/radiationModel/P1/P1.H
index b436a8509f..c0249e28db 100644
--- a/src/thermophysicalModels/radiation/radiationModel/P1/P1.H
+++ b/src/thermophysicalModels/radiation/radiationModel/P1/P1.H
@@ -59,7 +59,6 @@ class P1
 :
     public radiationModel
 {
-
     // Private data
 
         //- Incident radiation / [W/m2]
@@ -86,10 +85,6 @@ class P1
 
 public:
 
-   // Static data members
-
-        static label iterRadId;
-
     //- Runtime type information
     TypeName("P1");
 
@@ -108,10 +103,10 @@ public:
 
         // Edit
 
-            //- Update radiationSource varible
-            void correct();
+            //- Solve radiation equation(s)
+            void calculate();
 
-            //- Read radiationProperties dictionary
+            //- Read radiation properties dictionary
             bool read();
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.C b/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.C
index 4b57942cb7..222da749ad 100644
--- a/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.C
+++ b/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.C
@@ -50,9 +50,6 @@ namespace Foam
     }
 }
 
-//  Radiation solver iterator counter
-Foam::label Foam::radiation::fvDOM::iterRadId = pTraits<label>::one;
-
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
@@ -287,19 +284,13 @@ bool Foam::radiation::fvDOM::read()
 }
 
 
-void Foam::radiation::fvDOM::correct()
+void Foam::radiation::fvDOM::calculate()
 {
-    if (!radiation_ || !(iterRadId == nFlowIterPerRadIter_))
-    {
-        iterRadId++;
-        return;
-    }
-
     absorptionEmission_->correct(a_, aj_);
 
     updateBlackBodyEmission();
 
-    scalar maxResidual = 0;
+    scalar maxResidual = 0.0;
     label radIter = 0;
     do
     {
@@ -316,8 +307,6 @@ void Foam::radiation::fvDOM::correct()
     } while(maxResidual > convergence_);
 
     updateG();
-
-    iterRadId = pTraits<label>::one;
 }
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.H b/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.H
index 7989970177..3c25cce890 100644
--- a/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.H
+++ b/src/thermophysicalModels/radiation/radiationModel/fvDOM/fvDOM/fvDOM.H
@@ -136,11 +136,6 @@ class fvDOM
 
 public:
 
-    // Static data members
-
-        static label iterRadId;
-
-
     //- Runtime type information
     TypeName("fvDOM");
 
@@ -159,10 +154,10 @@ public:
 
         // Edit
 
-            //- Update radiation source variable
-            void correct();
+            //- Solve radiation equation(s)
+            void calculate();
 
-            //- Read radiationProperties dictionary
+            //- Read radiation properties dictionary
             bool read();
 
             //- Update G and calculate total heat flux on boundary
diff --git a/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C b/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
index 6d387ce4e7..062b07a85d 100644
--- a/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
+++ b/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
@@ -117,7 +117,7 @@ Foam::radiation::radiativeIntensityRay::radiativeIntensityRay
     {
         IOobject IHeader
         (
-            "Ilambda_" + name(rayId) + "_" + name(i),
+            "ILambda_" + name(rayId) + "_" + name(i),
             mesh_.time().timeName(),
             mesh_,
             IOobject::MUST_READ,
@@ -170,7 +170,7 @@ Foam::radiation::radiativeIntensityRay::~radiativeIntensityRay()
 Foam::scalar Foam::radiation::radiativeIntensityRay::correct()
 {
     // reset boundary heat flux to zero
-    Qr_ =  dimensionedScalar("zero", dimMass/pow3(dimTime), 0.0);
+    Qr_ = dimensionedScalar("zero", dimMass/pow3(dimTime), 0.0);
 
     scalar maxResidual = -GREAT;
 
diff --git a/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.H b/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.H
index 0f26639064..27fbf1bc71 100644
--- a/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.H
+++ b/src/thermophysicalModels/radiation/radiationModel/fvDOM/radiativeIntensityRay/radiativeIntensityRay.H
@@ -96,6 +96,9 @@ class radiativeIntensityRay
         //- List of pointers to radiative intensity fields for given wavelengths
         PtrList<volScalarField> ILambda_;
 
+        //- Global ray id - incremented in constructor
+        static label rayId;
+
 
     // Private member functions
 
@@ -108,11 +111,6 @@ class radiativeIntensityRay
 
 public:
 
-    // Static data members
-
-        static label rayId;
-
-
     // Constructors
 
         //- Construct form components
diff --git a/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.C b/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.C
index ca814fe305..fc6fbc549a 100644
--- a/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.C
+++ b/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.C
@@ -50,10 +50,9 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-// Construct from components
 Foam::radiation::noRadiation::noRadiation(const volScalarField& T)
 :
-    radiationModel(typeName, T)
+    radiationModel(T)
 {}
 
 
@@ -71,7 +70,7 @@ bool Foam::radiation::noRadiation::read()
 }
 
 
-void Foam::radiation::noRadiation::correct()
+void Foam::radiation::noRadiation::calculate()
 {
     // Do nothing
 }
diff --git a/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.H b/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.H
index 2c0e06dfde..2527ab1211 100644
--- a/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.H
+++ b/src/thermophysicalModels/radiation/radiationModel/noRadiation/noRadiation.H
@@ -54,7 +54,6 @@ class noRadiation
 :
     public radiationModel
 {
-
     // Private member functions
 
         //- Disallow default bitwise copy construct
@@ -76,7 +75,7 @@ public:
         noRadiation(const volScalarField& T);
 
 
-    // Destructor
+    //- Destructor
     virtual ~noRadiation();
 
 
@@ -84,8 +83,8 @@ public:
 
         // Edit
 
-            //- Update radiation source
-            void correct();
+            //- Solve radiation equation(s)
+            void calculate();
 
             //- Read radiationProperties dictionary
             bool read();
diff --git a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
index 28e10cd84e..131221c308 100644
--- a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
+++ b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
@@ -43,6 +43,30 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
+Foam::radiation::radiationModel::radiationModel(const volScalarField& T)
+:
+    IOdictionary
+    (
+        IOobject
+        (
+            "radiationProperties",
+            T.time().constant(),
+            T.mesh().objectRegistry::db(),
+            IOobject::MUST_READ,
+            IOobject::NO_WRITE
+        )
+    ),
+    mesh_(T.mesh()),
+    time_(T.time()),
+    T_(T),
+    radiation_(false),
+    coeffs_(dictionary::null),
+    solverFreq_(0),
+    absorptionEmission_(NULL),
+    scatter_(NULL)
+{}
+
+
 Foam::radiation::radiationModel::radiationModel
 (
     const word& type,
@@ -60,14 +84,17 @@ Foam::radiation::radiationModel::radiationModel
             IOobject::NO_WRITE
         )
     ),
-    T_(T),
     mesh_(T.mesh()),
+    time_(T.time()),
+    T_(T),
     radiation_(lookup("radiation")),
     coeffs_(subDict(type + "Coeffs")),
-    nFlowIterPerRadIter_(readLabel(lookup("nFlowIterPerRadIter"))),
+    solverFreq_(readLabel(lookup("solverFreq"))),
     absorptionEmission_(absorptionEmissionModel::New(*this, mesh_)),
     scatter_(scatterModel::New(*this, mesh_))
-{}
+{
+    solverFreq_ = max(1, solverFreq_);
+}
 
 
 // * * * * * * * * * * * * * * * * Destructor    * * * * * * * * * * * * * * //
@@ -94,6 +121,20 @@ bool Foam::radiation::radiationModel::read()
 }
 
 
+void Foam::radiation::radiationModel::correct()
+{
+    if (!radiation_)
+    {
+        return;
+    }
+
+    if ((time_.timeIndex() == 0) || (time_.timeIndex() % solverFreq_ == 0))
+    {
+        calculate();
+    }
+}
+
+
 Foam::tmp<Foam::fvScalarMatrix> Foam::radiation::radiationModel::Sh
 (
     basicThermo& thermo
diff --git a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.H b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.H
index 31e5dd2519..4d01dee1cf 100644
--- a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.H
+++ b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.H
@@ -73,21 +73,24 @@ protected:
 
     // Protected data
 
+        //- Reference to the mesh database
+        const fvMesh& mesh_;
+
+        //- Reference to the time database
+        const Time& time_;
+
         //- Reference to the temperature field
         const volScalarField& T_;
 
-        //- Reference to the mesh
-        const fvMesh& mesh_;
-
         //- Model specific dictionary input parameters
         Switch radiation_;
 
         //- Radiation model dictionary
         dictionary coeffs_;
 
-        //- Number of iterations in the flow solver per radiation solver
-        //  iteration
-        label nFlowIterPerRadIter_;
+        //- Radiation solver frequency - number flow solver iterations per
+        //  radiation solver iteration
+        label solverFreq_;
 
 
         // References to the radiation sub-models
@@ -132,6 +135,9 @@ public:
 
     // Constructors
 
+        //- Null constructor
+        radiationModel(const volScalarField& T);
+
         //- Construct from components
         radiationModel(const word& type, const volScalarField& T);
 
@@ -142,7 +148,7 @@ public:
          static autoPtr<radiationModel> New(const volScalarField& T);
 
 
-    // Destructor
+    //- Destructor
     virtual ~radiationModel();
 
 
@@ -150,8 +156,11 @@ public:
 
         // Edit
 
+            //- Main update/correction routine
+            virtual void correct();
+
             //- Solve radiation equation(s)
-            virtual void correct() = 0;
+            virtual void calculate() = 0;
 
             //- Read radiationProperties dictionary
             virtual bool read() = 0;