The requirements for hadron polarimetry at the future Electron Ion Collider (EIC) include measurements of the absolute helion ( 3 He, h) beam polarization with systematic uncertainties better than σ syst P /P ≤ 1%. Recently, it was proposed that the Polarized Atomic Hydrogen Gas Jet Target (HJET) be utilized for the precision measurement of the polarization of the ∼100 GeV/n helion beam. At the Relativistic Heavy Ion Collider, HJET serves to determine the absolute proton beam polarization with low systematic uncertainties of about δ syst P/P 0.5%. To adapt the HJET method for the EIC helion beam, the experimentally determined ratio of the beam and target (jet) spin-correlated asymmetries should be adjusted by the ratio of p ↑ h and h ↑ p analyzing powers. A potential problem with the suggested method is that the breakup of 3 He in polarization measurements could drastically affect the analyzing power ratio. However, an analysis of the breakup corrections, presented in this paper, reveals that while these corrections can be as substantial as ∼ 4%, the effect cancels out to a negligible level in the measured beam polarization.