Flicker
The PPS22 states (Planning Policy Statement 22 guide)
Shadow flicker can be mitigated by siting wind turbines at sufficient distance from residences likely to be affected.
Flicker effects have been proven to occur only within ten rotor diameters of a turbine. Therefore if the turbine has 80m diameter blades, the potential shadow flicker effect could be felt up to 800m from a turbine.
Note:The proposed turbines have a diameter of 90m, therefore the affected properties will be up to 900 metres away.
Peel Energy state
6.9 Shadow flicker
Rotating wind turbine blades have the potential cause shadow flicker
in nearby properties. PPS22 notes that "Flicker effects have been
proven to occur only within ten rotor diameters of a turbine.
This is equivalent in this case to up to 800 m.
It is however important to note that this distance is a guide
as to where flicker may occur rather than an exclusion zone. The
impacts of shadow flicker vary subject to site-specific features
Including terrain and screening amongst others. Proper assessment
should therefore be undertaken to identify the potential Impact.
There are a number of properties located within the 10 rotor
diameter radius the majority of which are located on the southern
edge of Broughton Moor where some screening already exists in the
form of other buildings and vegetation.
Should the evaluation show that any nearby properties are likely
to be effected by shadow flicker, a number of potential mitigation
options are available to minimize any effects.
Comment
The hub height is 80m and the total height is 125m ,then the rotor diameter is (125-80)x2=90m, 10 rotor diameters = 900m
Peel Energy have therefore knocked 100m off the PP22 distance .
Even knocking off 100m, Peel Energy states that there are a number of properties likely to be affected by flicker.
Peel Energy state that there are a number of mitigation options. PP22 states that the mitigation option is siting turbines further away from properties ,ie in this case further than 900 m from Broughton Moor.
Note PP22 states; Only properties within 130 degrees either side of north, relative to the turbines can be affected at these latitudes in the UK turbines do not cast long shadows on their southern side.