  High flux of electron neutrinos($\nue$) is produced at nuclear power reactors
through the decays of nuclei activated by neutron capture. Realistic simulation
studies on the neutron transport and capture at the reactor core were
performed. The production of $\chr51$ and $\fe55$ give rise to mono-energetic
$\nue$'s at Q-values of 753 keV and 231 keV and fluxes of $8.3 \times 10^{-4}$
and $3.0 \times 10^{-4}$ $\nue$/fission, respectively. Using data from a
germanium detector at the Kuo-Sheng Power Plant, we derived direct limits on
the $\nue$ magnetic moment and the radiative lifetime of $\mu_{\nu} < 1.3
\times 10^{-8} ~ \mub$ and $\rm{\tau_{\nu} / m_{\nu} > 0.11 s / eV}$ at 90%
confidence level (CL), respectively. Indirect bounds on $\rm{\tau_{\nu} /
m_{\nu}^3}$ were also inferred. The $\nue$-flux can be enhanced by loading
selected isotopes to the reactor core, and the potential applications and
achievable statistical accuracies were examined. These include accurate
cross-section measurements, studies of mixing angle $\theta_{13}$ and
monitoring of plutonium production.
