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We present calculations of Casimir energy (CE) in a system of quantizedelectromagnetic (EM) field interacting with an infinite circular cylindricalshell (which we call `the defect'). Interaction is described in the onlyQFT-consistent way by Chern-Simon action concentrated on the defect, with asingle coupling constant $a$.  For regularization of UV divergencies of the theory we use % physicallymotivated Pauli-Villars regularization of the free EM action. The divergenciesare extracted as a polynomial in regularization mass $M$, and they renormalizeclassical part of the surface action.  We reveal the dependence of CE on the coupling constant $a$. CorrespondingCasimir force is attractive for all values of $a$. For $a\to\infty$ wereproduce the known results for CE for perfectly conducting cylindrical shellfirst obtained by DeRaad and Milton.

Parity violating cylindrical shell in the framework of QED