File:PuAmBicomponentVsSingle.png

Suggestion of improving of stability of the heat generatots on Am-241 by adding 15% of Pu-241.

Heat generation by 1g of Am-241 versus time and

the heat generation by mixture of 0.85g of Am-241 and 0.15g of Pu-241.

Description

The picture is prepared for article https://mizugadro.mydns.jp/w/ChatGPT/TRY05/05.pdf

entitled

Improving stability of radiologic heater on Am-241 by plutonium-241 doping

Previous name:

Improving Stability of heat generation with the Bi-Isotopic Fuel: Pu-241 and Am-241

The article is draft; the final version is not yet ready.

Generator

#Warning: [[Python3]] needs to be installed in order to interpret the code below.
import matplotlib.pyplot as plt
import numpy as np

# Time span: 0 to 100 years
years = np.linspace(0, 100, 1000)

# Decay constants
lambda_Pu = np.log(2) / 14.4   # Pu-241 half-life
lambda_Am = np.log(2) / 432    # Am-241 half-life

# Heat generation rates (W/g) — already net of neutrino losses
heat_per_g_Pu = 0.0042
heat_per_g_Am = 0.115

# 1g Am-241 (single component)
Am_single = np.exp(-lambda_Am * years)
heat_Am_single = Am_single * heat_per_g_Am

# Bi-component mix: 0.85g Am-241 + 0.15g Pu-241
Am_mass = 0.85
Pu_mass = 0.15

# Time evolution
Pu_remaining = Pu_mass * np.exp(-lambda_Pu * years)
Am_generated = Pu_mass * (1 - np.exp(-lambda_Pu * years))
Am_total = Am_mass * np.exp(-lambda_Am * years) + Am_generated * np.exp(-lambda_Am * years)

# Total heat from bi-component fuel
heat_bi = Pu_remaining * heat_per_g_Pu + Am_total * heat_per_g_Am

# Plotting
plt.figure(figsize=(10, 6))
plt.plot(years, heat_Am_single, label="1g Am-241 (single)", linewidth=2)
plt.plot(years, heat_bi, label="0.85g Am-241 + 0.15g Pu-241", linewidth=2)
plt.xlabel("Time (years)")
plt.ylabel("Heat Output (W)")
plt.title("Heat Output Over 100 Years: Single vs. Bi-Isotope Fuel")
plt.legend()
plt.grid(True)
plt.tight_layout()
plt.savefig("PuAmBicomponentVsSingle.png")
plt.show()

Warning

However, the colleagues are free to modify the code as they like. If you find this code useful, then, please, attribute the source and the modification(s) if any.

References

Keywords

«[[]]», «Am-241», «Bateman equation», «C-heater», «Contamination», «Nuclear physics», «Nuclear waste», «Pu-241», «Python3», «[[]]»,

«Вечная грелка»,