We've made the calculates of the current rate of decay and the Sievert (impact of radiation for humans) for a Strontium source
The calculates are mentioned right below:

Once it was new, the source's information was:
Type: Sr90
Decay tax: 0.1μCi (Curie)
The Half-life: 28.8y

We did the conversion of units (from Ci to Bq):
1Bq = 27pCi
0.1μCi = 3.7*10³ Bq

The Strontium source had a disintegration tax of 3.7*10³Bq, and nowadays it has a 2.2*10³Bq tax:
Using the exponential decay tax's equation:

N(t)=N(0)*e^-(t / τ) -----> N=Disintegration tax (Bq);   t= Elapsed time;   τ= Half-life time.

N(t)=3.7*10³ *e^-(14.6 / 28.6) = 2.2*10³(Bq)

The Strontium's irradiation risk is 2847mSv/Year, considering the human tissue at 1cm.

That irradiation risk IS NOT safe, comparing to the annual dose limit at CERN, which is 500mSv/year.
The calculates:
Using a compost rule of three we have:

37MBq              ----  1cm ----      1MeV     ---- 10⁴mSv/h

2.2 *10⁽⁻³⁾MBq ---- 1cm ---- 0.546MeV  ---- X mSv/h

X= 22*0.546/37 = 0.325mSv/h = 2847mSv/y.